Episode: 1x01 | Airdate: Oct 17, 2013
After spending a childhood safely hidden away in a monastery, a teenage Mary Stuart arrives in France where she has been sent to secure Scotland's strategic alliance by formalizing her arranged engagement to the French King's dashing son, Prince Francis. Further complicating things is Bash, Francis' handsome, roguish half-brother and Francis' mother, Queen Catherine. When the strong-willed Queen learns of a prophecy that marriage to Mary will cost Francis his life, she is determined to save her son, no matter how many others have to pay with their lives.
Episode: 1x02 | Airdate: Oct 24, 2013
When Simon, an English envoy, tells Mary that the English are aware of her fragile engagement to Francis, Mary and Francis put on a show to protect their alliance. Meanwhile, when Queen Catherine learns that someone who knows about her plot to destroy Mary is still alive, she stops at nothing to make sure they are silenced for good.
Episode: 1x03 | Airdate: Oct 31, 2013
When England's armies threaten Scotland's borders, Mary asks King Henry for help, but he refuses. Tomas, the son of the King of Portugal, proposes marriage to Mary, promising her aid against England if she'll abandon Francis and turn to Tomas instead. Francis puts Bash in jeopardy when he lets his feelings for Mary cloud his judgment
Episode: 1x04 | Airdate: Nov 7, 2013
Mary has to decide if she is willing to lie and sentence a man to death in order to have King Henry let her out of her engagement to Prince Francis. Meanwhile, Francis and Bash are suspicious of Tomas' true intentions which will ultimately lead to a confrontation with disastrous results.
Episode: 1x05 | Airdate: Nov 14, 2013
When Olivia, who is an ex-lover of Francis', arrives at the castle, she brings the dangers of the woods with her. Mary seeks comfort in Bash. Bash is threatened by heretics for interfering with a sacred blood rite. Meanwhile, Aylee is forced to spy on Mary when Queen Catherine blackmails her.
Episode: 1x06 | Airdate: Nov 21, 2013
An attempt to scare Mary causes Queen Catherine to take drastic measures to make sure the guilty party is caught. Francis, aware of Bash and Mary's growing attraction, turns to Olivia. Bash ventures into the woods to pay his debt -- the human sacrifice the pagans demand -- and returns with blood on his hands. Meanwhile, Kenna comes clean with the girls about her affair with the King, to a mixed response.
Episode: 1x07 | Airdate: Dec 5, 2013
Mary and Francis are forced to rely on one another when the castle is taken hostage, and Catherine shocks everyone when she makes a surprising proposal to try to save their lives. Meanwhile, Bash's mother Diane tells Bash of her plan to have him legitimized.
Episode: 1x08 | Airdate: Dec 12, 2013
Nostradamus tells Mary of his prophecy that one among them will die soon, which causes Mary to make a decision that will forever change her relationship with Francis. Clarissa becomes bolder with her endeavors, while Kenna informs Catherine of Diane's plan for Bash, which ends up backfiring.
Episode: 1x09 | Airdate: Jan 23, 2014
When Mary and Bash are captured and forced to return to the castle, they discover Catherine waiting and even more determined to keep Mary and Francis apart. Francis learns of the prophecy, but his determination to wed Mary changes everything: in love in politics, tearing the bond of brothers apart, and hardening Catherine's resolve to destroy Mary at any cost. Caitlin Stasey,
Episode: 1x10 | Airdate: Jan 30, 2014
When a plot to kill Bash goes wrong, Queen Catherine is suspected of orchestrating it. Mary offers to help free a wrongly imprisoned pregnant peasant named Isobel who has a mysterious tie to Bash. Meanwhile, Lola blackmails Queen Catherine to keep her from trying to ruin Mary and Bash, whose bond continues to grow.
Episode: 1x11 | Airdate: Feb 6, 2014
When King Henry accuses Queen Catherine of treason and adultery, she sets out to save her life by exposing Bash's dark past. Mary and Bash go on a quest to expose an even more deadly secret from Catherine's past. Meanwhile, Nostradamus reveals the truth about the castle ghost, Clarissa, which shocks everyone.
Episode: 1x12 | Airdate: Feb 27, 2014
When Clarissa kidnaps the younger children of King Henry and Queen Catherine, Mary and Bash work with the Queen to find them, with tragic results. Meanwhile, when Lola attempts to help her brother with a debt he owes, Francis rescues her, causing the two of them to grow closer.
Episode: 1x13 | Airdate: Mar 6, 2014
With a forced marriage looming, Mary must consider both her heart and her nation when deciding whom she will wed - Francis or Bash - when Francis returns to court with Lola at his side. Further complicating matters is Mary's mother, Marie de Guise, who visits the castle with her own agenda for Mary. Marie's presence worries King Henry and Queen Catherine, who have their own plan for the future of France, regardless of who gets hurt in the process.
Episode: 1x14 | Airdate: Mar 13, 2014
Mary returns from her honeymoon and, suspicious of Lola's strange behavior, uncovers a deception that changes everything. Bash encounters a confused and terrified Olivia, an escaped victim of the terrors of the woods, which causes him to enlist Nostradamus for help. Meanwhile, when King Henry's odd behavior causes misfortune, he is forced to ask for Queen Catherine's aid.
Episode: 1x15 | Airdate: Mar 20, 2014
The castle is abuzz with First Light, where the women of the castle mingle with potential suitors. Much to Mary's dismay, Lola is reluctant to participate in the tradition. After another violent incident with the increasingly erratic King Henry, Kenna fears for her safety and confides in Queen Catherine, while Bash experiences the terrors of the woods and vows to uncover the truth behind the Darkness.
Episode: 1x16 | Airdate: Mar 27, 2014
When Francis reluctantly agrees to help Bash uncover the threat in the woods, he ends in grave danger, with only Bash to save him. Meanwhile, the King's madness causes chaos when a servant wins "Queen for the Day," and the King becomes obsessed with her. The King also forces a surprising, and unbreakable, union with a new couple at Court. Meanwhile, Greer gets caught kissing kitchen servant Leith, which threatens to ruin her.
Episode: 1x17 | Airdate: Apr 10, 2014
When Mary learns of a secret clause in her marriage contract that her mother, Marie de Guise and Queen Catherine orchestrated, Mary and Francis embark on a dangerous plan to turn Scotland against her mother - and Mary gets her first taste of power as the Queen of Scots.
Episode: 1x18 | Airdate: Apr 17, 2014
When Mary's brother James arrives in France and convinces Mary to return to Scotland, Francis is suspicious and uncovers a plot that would destroy Mary, which causes a rift between them. King Henry's downward spiral continues, leaving Penelope in charge, causing Catherine and Kenna to take drastic measures. Meanwhile, Lola becomes wary of Lord Julien's motives behind his marriage proposal.
Episode: 1x19 | Airdate: Apr 24, 2014
When Mary's uncle, the Duke of Guise, arrives in France with devastating news about her mother, Mary and Francis realize they are torn between putting their own countries first or saving their marriage. With the English throne in jeopardy, King Henry hatches an elaborate plan that will end in disaster. Meanwhile, Bash and Kenna solidify their marriage and begin to trust one another.
Episode: 1x20 | Airdate: May 1, 2014
Mary enlists a mercenary to help her, which forces her to realize there are sacrifices and lives she is willing to risk to save her country. Francis embraces his role as Dauphin to lead France in a brutal battle against England, and finds a new ally in Leith. Meanwhile, as Lola grows closer to Lord Julien, she gets increasingly suspicious that he is going to betray her.
Episode: 1x21 | Airdate: May 8, 2014
Mary and Catherine form an unlikely alliance when deciding how to deal with the increasingly manic King Henry, which puts Francis in jeopardy. Bash finds a boy who lived to tell about his encounter with the Darkness, which makes Bash determined to end it for good at any cost. Lord Julien reveals the truth about his motives, and Lola, blinded by love, finds herself in a dire situation after she attempts to protect him.
Episode: 1x22 | Airdate: May 15, 2014
When the King's madness and cruelty reaches a fevered pitch, Mary and Francis take action. Their choices could change the course of history, but an unforeseen terror brewing in the woods could cost them, and their friends, everything. Mary makes a drastic decision when she learns Lola is going through a life-threatening labor at a location outside of the castle.
Episode: 2x01 | Airdate: Oct 2, 2014
The new King and Queen of France, Francis and Mary are plummeted into chaos after the Black Plague ravages the land and creeps inside the castle, threatening lives and the stability of their new rule. Francis finds himself on the wrong side of the quarantined gates, with Lola, as they try to make their way back to safety. New and murderous foes are introduced as nobles grasp for power, pressuring Mary -- and Catherine -- even as the death count rises. Meanwhile, Kenna and Bash find themselves separated; Kenna's life endangered as she risks all to save their young ward. Greer is forced to watch Leith move on with a new love and is shocked to realize he's involved with her fiance's daughter.
Episode: 2x02 | Airdate: Oct 9, 2014
In the aftermath of the plague, a powerful lord discovers that Mary was responsible for the death of his son and demands vengeance, testing the loyalties of Mary, Francis and Catherine. Francis returns to the castle with Lola and their newborn son, creating tension with Mary. Greer is torn by her loyalty to her fiancé, Lord Castleroy (guest star Michael Therriault), who blames Leith for his daughter's demise. Meanwhile, Kenna urges Bash to be formally recognized in his new role.
Episode: 2x03 | Airdate: Oct 16, 2014
With France in a state of famine, as well as religious and political unrest, Mary looks for a way to feed the people, risking the wrath of a vengeful Lord Narcisse. Francis is preoccupied by the harrowing suspicion that his dead father's spirit can possess the living and is haunting Francis as revenge for his murder. As Catherine makes excessive and lavish preparations for a coronation ceremony to give the impression of stability to the realm, Bash confronts the reality of a country plagued by fear, bankruptcy, and murder.
Episode: 2x04 | Airdate: Oct 23, 2014
When a shepherd is attacked by shadowy riders in the night, Bash and Lord Condé investigate what may be the unrest of angry spirits or the beginnings of a religious war. Mary examines her relationship with Lola in light of the upcoming christening, with Francis' illegitimate child serving as both a bond and an obstacle between them. Greer takes control of her future when Leith returns to court. Meanwhile, Lola feels something is awry when Lord Narcisse introduces his familiar new bride.
Episode: 2x05 | Airdate: Oct 30, 2014
Tensions between Protestants and Catholics escalate when bloodshed at a Protestant service causes an already concerned Mary and Francis to intervene on the eve of Greer's wedding. Bash and Leith lead a search for the guilty that reveals a surprising secret about Castleroy that could destroy his union with Greer. Meanwhile, Francis receives an unwelcome gift from his dead father. Kenna discovers a sex journal, with clues leading to the best lover at court, who just might be a match for Lola.
Episode: 2x06 | Airdate: Nov 6, 2014
Upon encountering a mob of angry peasants, Queens Mary and Catherine find themselves concealing their true identities after being forced to abandon their carriage and escape into the woods. Fearful the uprising is a response to his own actions, Francis forms a search party that includes Leith and Condé, only to discover the attack is actually a result of imposters abusing the power of the crown. Meanwhile, Lola sets out to become financially independent but, in the process, finds herself considering a complicated yet intriguing offer from Lord Narcisse.
Episode: 2x07 | Airdate: Nov 13, 2014
Young, reckless and provocative Princess Claude makes a surprise visit home, torturing her already haunted mother, Catherine. Francis is pressured by Narcisse to act against his conscience or risk his throne and his wife. Mary finds a new ally in Condé. Francis confides in Bash and hatches a plot that involves an uncertain Lola. Kenna mistakes Claude for a newfound friend, while Greer returns earlier than expected from her wedding tour.
Episode: 2x08 | Airdate: Nov 20, 2014
Tensions escalate between Mary and Francis when Vatican inquisitors perform barbaric acts on anyone suspected of being a Protestant. After a brave proclamation, Lord Condé is abducted, resulting in a precarious situation with a surprising group of assailants. Catherine experiences an annoying setback when she plays matchmaker on behalf of a reluctant Claude, while Narcisse offers a stranded Lola an innocent horse ride back to the castle, where a dark secret involving Francis is revealed.
Episode: 2x09 | Airdate: Dec 4, 2014
With a holiday celebration around the corner, Bash uncovers what could be the answer to Francis finally escaping the oppressive thumb of Lord Narcisse, and the two formulate a daring plan. Meanwhile, Mary proposes the radical idea of marrying the Protestant Lord Condé (Sean Teale) to the Catholic Claude, a scheme that she believes a viable path forward to peace, but Claude has other plans in store. As preparations are made for the upcoming feast, Greer discovers that she may be more involved with the Protestant movement than she originally thought.
Episode: 2x10 | Airdate: Dec 11, 2014
In the aftermath of an attack on the castle, a blood-thirsty Francis makes a startling decision that will forever change his rule as the King of France, causing him to track the missing Narcisse with a newfound lust for revenge. Meanwhile, Mary is stunned to discover the truth behind Francis' recent decisions and embarks on a treacherous mission of her own with Lord Condé (Sean Teale). Leith urgently pleads with Greer to flee the country after violence erupts across the land. Catherine receives an unexpected and erotic visit in her chambers after making a final decision regarding the fate of her daughter Claude.
Episode: 2x11 | Airdate: Jan 22, 2015
Mary takes action to save Condé when she learns the Vatican is hunting him for bearing the branded mark of the Dark Riders. Francis devises a plan to put an end to the Dark Riders legend, which puts Bash at risk. Meanwhile, Kenna reveals Catherine's ulterior motives to Claude.
Episode: 2x12 | Airdate: Jan 29, 2015
Mary finds out the truth from Greer about rumors going around Court, forcing Mary to do something she never thought possible. Francis finds himself in a growing rivalry with Condé for Mary. Bash's mother Diane returns, igniting a long overdue confrontation with Catherine, while Claude is determined to find out the truth about who really killed the twins.
Episode: 2x13 | Airdate: Feb 5, 2015
As the castle prepares for the Winter's Ease Feast, King Antoine of Navarre reveals to Francis and Mary England's plan for revenge against France. Bash learns that an "undead" man has been seen in the village and his efforts to track the man down lead him to a mysterious woman in white. Meanwhile, Catherine finds out the cause of her hallucinations.
Episode: 2x14 | Airdate: Feb 12, 2015
As Mary and Francis investigate who was behind the poisoning of King Henry, they unearth secrets of the past which force Mary to confront her feelings for Condé as she attempts to move forward. Catherine finds herself in the middle of a romantic triangle when the Duke of Guise returns, which forces Narcisse to commit a hideous act out of desperation. Meanwhile, Greer finds herself in a situation she never fathomed in order to survive.
Episode: 2x15 | Airdate: Feb 19, 2015
Mary's mother returns to advise Mary that her throne is in jeopardy. Mary makes a shocking proposition to Condé, along with a bold move to reclaim her throne. Francis moves closer to Lola after a setback with Mary, while King Antoine makes Kenna an interesting offer.
Episode: 2x16 | Airdate: Mar 12, 2015
When King Antoine threatens to tell Francis of Mary and Condé's evolving relationship, Francis makes a shocking move. Bash and Kenna's marriage is beyond repair after he learns of her scheming, while Leith discovers Greer's unsavory new career path.
Episode: 2x17 | Airdate: Mar 19, 2015
When Catherine becomes suspicious that Mary and Condé are having an affair, Mary risks Catherine discovering just how deep her betrayal goes. Francis becomes gravely ill after he collapses and Bash's life is in jeopardy when he leaves to work as the King's Deputy. Meanwhile, things become complicated for Leith when he is forced to be Claude's personal guard after professing his love for Greer.
Episode: 2x18 | Airdate: Apr 16, 2015
While Francis' life hangs in the balance, Mary becomes the temporary leader of France, which makes her realize she can use her newfound power to save Scotland. Catherine, knowing about Mary's indiscretion with Condé, enlists in Narcisse to help beat Mary at her own game. Meanwhile, Bash, having been saved by a Woman in White and determined to send his attempted murderer to death, discovers a familiar face in the village.
Episode: 2x19 | Airdate: Apr 23, 2015
Mary, with the threat of England looming, aligns herself with France and thus, the ailing Francis. Condé makes a bold move that would tie him to England. With all of the turmoil, Catherine and Narcisse work to win favor in court. Meanwhile, Kenna gets closer to General Renaude as Bash becomes increasingly distant.
Episode: 2x20 | Airdate: Apr 30, 2015
Mary goes to extremes to halt Francis from his quest to catch Condé at any cost. Catherine, jealous of Narcisse's relationship with Lola, asks him to do something unforgiveable to prove himself, Kenna crosses a line with General Renaude and Greer makes a choice that might end her relationship with Leith.
Episode: 2x21 | Airdate: May 7, 2015
As troops are about to descend on the castle, Mary and Francis must put aside their differences to determine the extent of Condé's betrayal. Mary also learns of a bittersweet revelation that tears her apart and makes her question everything. Meanwhile, Catherine decides to teach Narcisse a lesson to prove he can never cross her again and Bash decides to bring Delphine to the castle.
Episode: 2x22 | Airdate: May 14, 2015
Mary risks everything to take down Condé, even as Francis believes she is turning against France. Catherine makes a bold move and meets with Queen Elizabeth in a stunning plot to seek revenge on Mary. Meanwhile, Kenna has a secret that will seal the fate of her relationship with Bash.
Episode: 3x01 | Airdate: Oct 9, 2015
Queen Mary struggles to hold on to her power in Scotland amidst Queen Elizabeth's campaign to sabotage her with the help of a new ally in Queen Catherine. Meanwhile, with Francis' fate at odds and Elizabeth distracted by temptation in her first love, Robert Dudley, both queens struggle to rule.
Episode: 3x02 | Airdate: Oct 16, 2015
Elizabeth must deal with the political backlash of harboring Catherine in England, while Catherine is imprisoned upon her return to France. Mary is forced to make some difficult decisions about securing Scotland's future and Lola is conflicted in her feelings for Narcisse.
Episode: 3x03 | Airdate: Oct 23, 2015
When King Antoine unexpectedly returns to Court, Mary must help Francis hide his weakening condition long enough to secure his family's future. With the Throne in jeopardy and time running out, they must turn to an unlikely ally in need of redemption. Megan Fellows, Anna Popplewell, Craig Parker, Torrance Coombs, Celina Sinden, Jonathan Keltz and Rose Williams star.
Episode: 3x04 | Airdate: Nov 6, 2015
After Mary receives an urgent message from her ailing mother (guest star Amy Brenneman) about the dire situation in Scotland, she finds herself looking to Francis for aid. Catherine finds herself up against Narcisse as she fights to become the regent to Charles. Meanwhile, Elizabeth faces continued pressure to wed. Anna Popplewell, Torrance Coombs, Celina Sinden, Charlie Carrick, Jonathan Keltz and Rose Williams star.
Episode: 3x05 | Airdate: Nov 13, 2015
Grateful for a future with a revived Francis, Mary considers signing away her claim to the English throne, and staying in France forever. Catherine learns that Nostradamus has returned -- with a new vision involving Francis' fate.
Episode: 3x06 | Airdate: Nov 20, 2015
Mary realizes she must help Catherine in her quest to become regent, even at the risk of hurting the alliance with Scotland. Claude is determined to help Leith marry while Elizabeth struggles with the prospect of losing Dudley. Charles Binamé directed the episode.
Episode: 3x07 | Airdate: Dec 4, 2015
When Prince Don Carlos of Spain visits France, Mary uncovers a dark secret he is hiding and enlists in Catherine to advise her on how to handle. When Gideon, the new ambassador from English court arrives, suspicions arise about what his true intentions are, while Bash's pursuit of the mysterious killer comes to a head at Greer's tavern.
Episode: 3x08 | Airdate: Jan 8, 2016
As Mary and Catherine deal with the aftermath of Prince Don Carlos' accident, Mary realizes that she will have to marry for the good of her country and not follow her heart. When Catherine is accused of poisoning Francis, Lola is shocked when Mary thinks Narcisse framed Catherine in order to become Regent of France.
Episode: 3x09 | Airdate: Jan 15, 2016
Mary becomes suspicious of Prince Don Carlos' true condition and relies on Gideon to help her uncover the truth. Elizabeth makes a shocking discovery which could change the course of her reign over England and forces Dudley to make a tough decision. Meanwhile, Narcisse forces Claude to marry someone of his choosing, against her wishes.
Episode: 3x10 | Airdate: Jan 22, 2016
Mary struggles to resist her feelings for Gideon as she works to align herself politically with potential allies. Elizabeth and Greer find themselves in similar heart-wrenching situations with the potential for very different outcomes. Catherine and Narcisse continue their vicious power struggle over the Regency, while Claude finds herself in the fight of her life on her wedding night.
Episode: 3x11 | Airdate: Apr 25, 2016
Mary must find a powerful suitor to align herself with as Charles' impending Coronation looms. Lola stumbles upon the identity of Elizabeth's poisoner, while Catherine becomes a new kind of victim for the castle's serial killer.
Episode: 3x12 | Airdate: May 2, 2016
Mary might have to sacrifice her cousin's life to save her own, as she and Gideon find themselves in unchartered emotional territory. Catherine's past returns to haunt her, while Lola and Elizabeth become unlikely allies.
Episode: 3x13 | Airdate: May 9, 2016
Mary, in order to protect Elizabeth, unknowingly puts Gideon's life in danger. To save him, Mary turns to another Englishman for help - Robert Dudley. Meanwhile, Bash is determined to track down the men behind the threats to Catherine.
Episode: 3x14 | Airdate: May 16, 2016
Mary realizes her need to return to Scotland is becoming increasingly imminent and that along with the help of Bash, she must raise her own army to save her throne. Elizabeth enlists Lola's help to find out information about her mother, which backfires when Lola gets caught.
Episode: 3x15 | Airdate: May 23, 2016
Mary learns from Lola that she has a chance to get to Scotland safely, but she must act quietly and quickly. When Catherine is framed for murder, Mary must decide if she should stay to protect her, which would jeopardize her safe passage to Scotland.
Episode: 3x16 | Airdate: Jun 6, 2016
When Mary arrives in Scotland, she is stunned by the treacherous world it has become and is forced her to keep her royal identity a secret until she learns who she can trust. When Elizabeth jeopardizes her standing with an unbearable new suitor, Lola steps in to help, which causes the Queen to question Lola's ulterior motives. Meanwhile, Charles secretly plots to relinquish Catherine of her power.
Episode: 3x17 | Airdate: Jun 13, 2016
Mary is presumed dead, so Elizabeth seeks her crown with assistance from Lola. Meanwhile, Mary's half brother tries to safeguard her throne from John Knox; and Mary and Bash wind up in the clutches of the intimidating clan leader who killed Francis.
Episode: 3x18 | Airdate: Jun 20, 2016
Mary makes a bold move to defend her reign in Scotland, which results in a battle royale with her cousin, Elizabeth. Lola is accused of a heinous crime and suffers the drastic consequences. Meanwhile, back in France, Catherine finds that Charles has returned a changed man after paying a price for his mother's relentless quest for power.
Episode: 4x01 | Airdate: Feb 10, 2017
Queen Mary, unsure who to trust, tests her brother James to ensure his loyalty after hearing of his meeting with John Knox. Queen Elizabeth agrees to help Lord Darnley, in an attempt to sabotage the powerful suitor's relationship with Mary.
Episode: 4x02 | Airdate: Feb 17, 2017
Queen Mary discovers there is a leak amongst her advisors and sets out to uncover the traitor. Queen Elizabeth enlists in Narcisse to further her quest for supremacy. Meanwhile, Catherine takes desperate measures to regain some of the power she has lost.
Episode: 4x03 | Airdate: Feb 24, 2017
Gideon shows Mary what life could be like if she chose love over country. Catherine fights to cover King Charles' increasingly erratic behavior, while Claude finds an unlikely enemy in her sister
Episode: 4x04 | Airdate: Mar 3, 2017
When Lord Darnley surprises Mary with a visit in Scotland, Mary sees a glimmer of a union that could be more than just political. Elizabeth fights to gain allies in her favor and Catherine must work to get Claude back on track by finding her a new husband.
Episode: 4x05 | Airdate: Mar 17, 2017
In order to get Mary to agree to a marriage, Lord Darnley must demonstrate his loyalty when she voices her concerns about his true intentions. Catherine and Narcisse work to repair King Charles' reputation after rumors spread about his strange behavior and threaten the throne.
Episode: 4x06 | Airdate: Mar 24, 2017
Mary must deal with the political repercussions of a potential marriage to Lord Darnley and King Charles disappears, leaving Catherine to pick up the pieces. Elizabeth comes to Gideon's aid, while Claude receives an interesting proposition.
Episode: 4x07 | Airdate: Mar 31, 2017
When Darnley gets a surprise visitor, his marriage to Mary hangs in the balance. Elizabeth learns her attempt to stop Mary backfired. Meanwhile, Catherine and Narcisse find King Charles and must convince him to return to the castle.
Episode: 4x08 | Airdate: Apr 7, 2017
A tragedy occurs, pushing Mary and Darnley apart as their wedding looms. Meanwhile, Mary is forced to enlist help from Catherine; and a traitor to Spain petitions Elizabeth to support an expedition to the New World.
Episode: 4x09 | Airdate: Apr 14, 2017
Mary and Darnley wed in a lavish affair, which proves to be a successful decision in regards to her political standing. James makes an interesting discovery about Greer, while Elizabeth frantically tries to salvage England's power.
Episode: 4x10 | Airdate: Apr 28, 2017
As Mary strategizes ways to take over the English throne, Elizabeth struggles to find an appropriate suitor to marry. Meanwhile, James gets caught up in a scheme orchestrated by John Knox and has to deal with the tragic aftermath.
Episode: 4x11 | Airdate: May 5, 2017
Mary and Darnley are at odds as they put their plan to seize England into action. Elizabeth is conflicted about her feelings for Gideon as she attempts to find a Catholic to marry. Catherine's son Henri attempts to claim the throne from Charles with the support of Spain and Narcisse.
Episode: 4x12 | Airdate: May 12, 2017
An earthquake hits Scotland, and Mary faces claims she isn't coming to the aid of her people. Meanwhile, Elizabeth takes drastic measures after she is discovered with Gideon; and Charles make a decision that backfires.
Episode: 4x13 | Airdate: May 19, 2017
Darnley teams up with John Knox to strip Mary of her throne, which will leave a close friend of Mary's dead. Elizabeth must banish Gideon from court at the request of her future husband, while Charles takes a bold stance against his brother Henri.
Episode: 4x14 | Airdate: Jun 2, 2017
Mary pursues justice by launching a counterattack on her conspirators. Meanwhile, Elizabeth suffers a major setback, and it turns her world upside down.
Episode: 4x15 | Airdate: Jun 9, 2017
Mary's life hangs in the balance — Childbirth threatens to take Mary's life, which leaves her and her unborn child's safety in jeopardy. Elizabeth discovers that someone in her inner circle was the cause of the death of someone close to her.
Episode: 4x16 | Airdate: Jun 16, 2017
Mary makes a decision that will change the course of history -- forever shaping the fate of her nation, her crown, and her newborn son. Mary's perilous move for her survival causes the stunning realization that perhaps she is not the only one who may not survive. Meanwhile, Elizabeth steadies herself for war and will become the instigator in Mary's demise while later realizing she and Mary might be more similar than either thought.