Episode: 1x01 | Airdate: Jul 12, 2017
When MIT grad student Liam Cole discovers an asteroid is set to collide with Earth in 186 days, he joins forces with tech billionaire Darius Tanz and the U.S. government to try and stop it – and together they stumble onto the greatest conspiracy never told.
Episode: 1x02 | Airdate: Jul 19, 2017
Darius and Liam work to invent a theoretically impossible piece of technology to divert the asteroid, and Grace risks everything to help Darius. Also, Liam heads home to Boston to track down critical research, but finds something shocking instead.
Episode: 1x03 | Airdate: Jul 26, 2017
It's a race against time as Darius must accelerate his plan to stop the asteroid before the Pentagon shuts him down. Also, Grace has to make difficult decisions that could have life or death consequences for millions of people, and Liam and Jillian reunite under surprising circumstances.
Episode: 1x04 | Airdate: Aug 2, 2017
To prove to Harris and Grace that he's not a traitor, Darius must reveal a closely guarded secret; Liam helps Jillian adjust to her new job at Tanz.
Episode: 1x05 | Airdate: Aug 2, 2017
Darius tries to discover who killed his friend Lazlo; Liam discovers who's been selling secrets to the Russians.
Episode: 1x06 | Airdate: Aug 9, 2017
Darius recruits Grace, Harris and Liam for a dangerous mission, and Jillian confronts Liam about his secret.
Episode: 1x07 | Airdate: Aug 16, 2017
Grace and Darius slip off to Russia behind Harris' back in an attempt to stop a potential nuclear conflict. Also, Liam seeks solace with Amanda.
Episode: 1x08 | Airdate: Aug 16, 2017
Darius and Grace are framed for murder and must escape from Russia; Liam tries to get Jillian to come back to Tanz.
Episode: 1x09 | Airdate: Aug 23, 2017
Grace narrowly escapes a deadly assassin and Darius and Liam forge unlikely alliances.
Episode: 1x10 | Airdate: Aug 30, 2017
Grace and Darius seek answers from the President and Harris discovers deadly secrets.
Episode: 1x11 | Airdate: Sep 6, 2017
Grace and Harris must forge an alliance when their children's lives are in jeopardy. Also, Liam presents Jillian with an unusual proposal.
Episode: 1x12 | Airdate: Sep 13, 2017
Darius, Grace and Harris join forces to prove the president was murdered. Also, Grace tells Zoe the truth.
Episode: 1x13 | Airdate: Sep 20, 2017
An illegitimate government now complicates efforts to save mankind from Sampson, the killer asteroid. After the discovery that President Mackenzie is still alive—but had been poisoned—Harris, Grace, and Darius are scrambling to topple the new administration of President Bennett. Meanwhile, Darius is running out of time to finalize his plans for the ark. Will there be a real future for Liam and Jillian? Will Darius, who was disqualified from his own escape plan, find another solution?
Episode: 2x01 | Airdate: Jun 25, 2018
The secret of the asteroid becomes public following a nuclear incident, setting the world on a dangerous course. Also, Darius, Grace, Liam and Harris must adapt to new roles in an ever-shifting landscape of fear and civil unrest.
Episode: 2x02 | Airdate: Jul 2, 2018
Darius and Grace must forge an emotional détente in order to get international cooperation. Also, Liam meets a new scientist with a mysterious past.
Episode: 2x03 | Airdate: Jul 9, 2018
Loyalties are tested when Grace is asked to lie under oath. Also, Darius tasks Liam with a dangerous mission, and a shocking act of violence plunges the nation into chaos.
Episode: 2x04 | Airdate: Jul 16, 2018
Grace embarks on a dangerous mission, and Liam and Darius' relationship is tested.
Episode: 2x05 | Airdate: Jul 23, 2018
Grace forges a dangerous alliance with Claire's brother, Alonzo. Also, Harris and Darius must work together to face down Bennett's forces.
Episode: 2x06 | Airdate: Jul 30, 2018
Darius and Grace's relationship is tested, and President Mackenzie attempts to bring the fractured country together while the hacktivist group Re/Syst issues a deadly edict.
Episode: 2x07 | Airdate: Aug 6, 2018
Darius vows revenge on the hacktivist group Re/Syst, no matter what the cost. Also, Harris discovers a dark secret and Grace reveals one of her own.
Episode: 2x08 | Airdate: Aug 13, 2018
Desperate to defuse a nuclear standoff, Liam receives help from an unlikely source. Also, with Darius missing, Harris and Grace take matters into their own hands.
Episode: 2x09 | Airdate: Aug 20, 2018
Darius, Grace and Harris uncover the darkest secret yet, and Liam reconnects with Jillian.
Episode: 2x10 | Airdate: Aug 27, 2018
Darius forms a dangerous alliance in order to destroy the dark money forces of Q17. Also, Grace takes action when surprising news jolts her world.
Episode: 2x11 | Airdate: Sep 3, 2018
A stand-off at the COPE compound leads to tragic results.
Episode: 2x12 | Airdate: Sep 10, 2018
The government's final plans for a doomsday scenario set in motion a surprising chain of events for Grace, Darius and Harris.
Episode: 2x13 | Airdate: Sep 17, 2018
One last mystery holds the key to saving the world, and Grace must choose how she spends her final days.