Season 1
Episode: 1x01 | Airdate: Jan 5, 2009
Erica loses her job and boyfriend. A latte sample with nuts sends her to the hospital. She meets Dr. Tom. She consults him and makes a list of what went wrong in her life. She's suddenly back in high school, 16 not 32 y.o.
Episode: 1x02 | Airdate: Jan 12, 2009
Erica goes back to 1995, her second year of university, where she is invited to join a secret society.
Episode: 1x03 | Airdate: Jan 19, 2009
Erica is forced to confront her first sexual experience in Muskoka to understand and overcome her relationship woes.
Episode: 1x04 | Airdate: Jan 26, 2009
Erica is sent back to her first term at university where she learns to stand up to her haughty professor. Dr Tom hopes that in doing so, Erica will be able to use the skills to confront her bullying new boss.
Episode: 1x05 | Airdate: Feb 2, 2009
Erica is sick of being treated like a child so Dr Tom sends her back to her Bat Mitzvah, which is the source of the problem, so that she can prove herself as a woman.
Episode: 1x06 | Airdate: Feb 11, 2009
Erica tries to persuade her sister Samantha not to marry Josh, and Dr Tom sends her back in time to prevent the two from falling in love but discovers a secret that threatens her relationship with Samantha.
Episode: 1x07 | Airdate: Feb 18, 2009
Erica is stressed out and struggling to juggle work and family life. Luckily, Dr Tom decides to give her a break and sends her back to a `perfect day'.
Episode: 1x08 | Airdate: Feb 25, 2009
Erica seeks her sister Samantha's forgiveness as Yom Kippur approaches, but before she can expect forgiveness from Sam, Dr Tom sends her back in time to help understand more about her parents' divorce and learn to forgive them.
Episode: 1x09 | Airdate: Mar 4, 2009
Erica relives a love affair from her university days as a means of exploring her feelings for Ryan.
Episode: 1x10 | Airdate: Mar 11, 2009
Erica is sent back in time to the source of her feud with enemy Katie to discover why the two, who were best friends for a while, fell out.
Episode: 1x11 | Airdate: Mar 18, 2009
Erica supervises the launch of Katie's new book but finds that her controlling behavior is hindering progress. Upon this, she realizes that her need to control things might be ruining her chances of having a romantic relationship with Ethan.
Episode: 1x12 | Airdate: Mar 25, 2009
Erica longs to become more spontaneous and fun-loving and is sent back in time by Dr Tom to a time where her narrow-mindedness hurt somebody close to her.
Episode: 1x13 | Airdate: Apr 1, 2009
Dr Tom sends Erica back to the time of her biggest regret - her brother Leo's death, and Erica discovers that playing God isn't as trouble-free as she thought.
Season 2
Episode: 2x01 | Airdate: Sep 22, 2009
Erica explores Dr. Tom's troubled past after Dr. Naadiah takes over her therapy in the Season 2 opener.
Episode: 2x02 | Airdate: Sep 29, 2009
Erica is sent back in time to her teen years where she unearths some lessons from her early relationships that help mend her current conflict with Ethan.
Episode: 2x03 | Airdate: Oct 6, 2009
Erica babysits Max for the first time but Judith is unhappy with her inability to stick to her rules. Erica goes back in time to prove to Judith that she isn't as incompetent as she believes her to be.
Episode: 2x04 | Airdate: Oct 13, 2009
Erica revisits a summer spent in Taipei, Taiwan.
Episode: 2x05 | Airdate: Oct 20, 2009
Dr Tom gives Erica the chance to relive a day without any consequence for her actions. Will Erica come to appreciate the consequences of her decisions when she's without them?
Episode: 2x06 | Airdate: Oct 27, 2009
Erica finds herself caught in the middle of other people's revelations. Will it make her re-address her thoughts on keeping secrets to herself?
Episode: 2x07 | Airdate: Nov 3, 2009
Erica visits the future after she faints at a family bris, and learns a lesson about which problems she can solve.
Episode: 2x08 | Airdate: Nov 10, 2009
Erica asks Dr Tom for an entry to her past so she can escape from everybody else's problems. Will he send her back or does he have something else in mind?
Episode: 2x09 | Airdate: Nov 17, 2009
Erica takes a trip back in time to a childhood outing with her brother Leo where she sees a different side to him. Will it make Erica see her relationship with Kai in another light?
Episode: 2x10 | Airdate: Nov 24, 2009
Dr. Tom revisits the past, returning to the last time he saw his daughter, which results in an epiphany about the nature of relationships.
Episode: 2x11 | Airdate: Dec 1, 2009
Erica's stability is threatened by changes at River Rock Publishing, and Dr Tom shows her an alternative to her life which is free of setbacks. Can she come to see setbacks as useful?
Episode: 2x12 | Airdate: Dec 8, 2009
In the Season 2 finale, Erica is desperate for direction as she faces big decisions regarding her love life and career. Meanwhile, Dr. Tom adds a new slant to her therapy sessions.
Season 3
Episode: 3x01 | Airdate: Sep 21, 2010
Dr Tom sends Erica to the next stage of her treatment - group therapy. Erica must learn to help others as well as herself, but will it just be her own past that she ends up exploring?
Episode: 3x02 | Airdate: Sep 28, 2010
Erica is determined to pick herself up after her break-up with Ethan. Dr Tom knows someone from Erica's past who knows exactly how she feels, but will Claire and Erica be able to put their differences to one side to help each other?
Episode: 3x03 | Airdate: Oct 5, 2010
Erica revisits the site of Leo's fraternity pledge, where she learns a lesson about the dangers of taking the low road.
Episode: 3x04 | Airdate: Oct 12, 2010
Kai's return prompts Erica to face up to her own mortality and try to embrace the present.
Episode: 3x05 | Airdate: Oct 20, 2010
Adam gets the chance to alter the circumstances that led him to a life of violence and crime. It's a path that Adam is sure he can't change; that is until he winds up in a surprising new present.
Episode: 3x06 | Airdate: Oct 27, 2010
Cassidy returns for Pride weekend in Toronto and Dr Tom instructs Erica to let her impulses guide her.
Episode: 3x07 | Airdate: Nov 3, 2010
Jenny returns and wants to get her life back on track. Erica is eager to aid her friend but a trip to Black Creek Pioneer Village shows her that the helping hand Jenny needs is her own.
Episode: 3x08 | Airdate: Nov 10, 2010
The surprise return of a person from Dr Tom's past forces him to face old demons. Meanwhile, Kai returns to 2010 and Erica makes a decision that could affect both of their futures.
Episode: 3x09 | Airdate: Nov 17, 2010
Erica's therapy session uncovers a shocking secret that could mean the end of 50/50 Press. Dr Tom has a time-altering solution for her but will Dr Arthur allow it?
Episode: 3x10 | Airdate: Nov 24, 2010
Erica is offered an incredible career opportunity, which presents her with a difficult choice. To help her make her decision, Dr Tom sends Erica and Adam to a deserted island, to learn new ways of survival.
Episode: 3x11 | Airdate: Dec 1, 2010
Erica and Adam are encouraged to confront their true feelings. For Adam, it leads to a journey into his family's dark past, where he discovers a startling memory that he has locked away.
Episode: 3x12 | Airdate: Dec 8, 2010
After three years of time-travel therapy with Dr Tom, Erica has visited the past, jumped to the future and changed her life in the process, but now she has arrived right back where she started.
Episode: 3x13 | Airdate: Dec 15, 2010
Erica is helping host 50/50 Press' first Christmas party, much to the disappointment of her Rabbi father. In an effort to give Adam the perfect Christmas, Erica travels back to past Christmases.
Season 4
Episode: 4x01 | Airdate: Sep 26, 2011
In the opening episode of the fourth series, trainee doctor Erica discovers that her first patient is Josh, who is about to sign his divorce papers after splitting up with her sister. Erica doesn't think that she can help Josh move forward because she dislikes him, so Doctor Tom tries to help her by getting to the root of her antipathy.
Episode: 4x02 | Airdate: Oct 3, 2011
Erica tries to delve into Julianne's bullying nature while a new assistant tries to adapt at 50/50 Press.
Episode: 4x03 | Airdate: Oct 10, 2011
Sam and Erica's mother and father host a lunch for Lenin's parents to celebrate the baby news, but Barb doesn't seem to be taking it well and makes the event uncomfortable for everyone. In an effort to find out what's behind Barb's reaction, Doctor Tom sends Erica back to 1969, when her mother was a 17-year-old high school student.
Episode: 4x04 | Airdate: Oct 17, 2011
Erica revisits her high-school days to help an exchange student; Brent doesn't jive well with the new River Rock.
Episode: 4x05 | Airdate: Oct 24, 2011
Dr Naadiah realises that Doctor Tom is repeating his old patterns of behavior outside the office and she encourages him to return his ex-fiancée Amanda's calls.
Episode: 4x06 | Airdate: Oct 31, 2011
Dr. Tom grants Erica limited time-travel powers as part of her training and she is tempted to use them to resolve her arguments with Adam before they can get out of hand.
Episode: 4x07 | Airdate: Nov 7, 2011
Erica bonds with Ethan in both the past and the present; Julianne and Brent share a revelation.
Episode: 4x08 | Airdate: Nov 14, 2011
Julianne and Brent continue to hide their affair, while a visit from an unexpected person from Erica's future may shed some light on what the future may hold for her. Dr. Tom, on the other hand, isn't allowed to divulge the nature of his work to Amanda, which may place a wedge between the two.
Episode: 4x09 | Airdate: Nov 28, 2011
Erica has relationship fantasies on Dave and Ivan's wedding day.
Episode: 4x10 | Airdate: Dec 5, 2011
Erica revisits her family's 1992 Purim party after she receives an unwelcome birthday surprise from Julianne.
Episode: 4x11 | Airdate: Dec 12, 2011
In the series finale, 50/50 reaches an important milestone as the publishing company branches out into fiction. Erica begins to experience headaches and visions as her training comes to an end and she realizes that she is becoming a fully-fledged doctor who can time travel at will.