When Kiera goes to track Gardiner back to Fisker and Associates, his last known whereabouts, she discovers the business has boarded up and vanished. Carlos informs her that Lucas has been deemed psychotic and shouldn't be a problem for them any longer. Kiera confesses to Carlos that she's worried about the potential for time-travel induced psychosis (evidenced by Jason and now Lucas).
Alec tells Kiera that he's fused the time travel device with Lucas's software. The possibility now exists that he could reactivate it, sending Kiera back home - to what future remains uncertain. The only thing that's missing is an antimatter power source, one that's being developed by LaRoche Industries and recently acquired by PIRON. Kiera is driven to get the tech from Escher.
Carlos meets fellow VPD detective Rosicki about an abandoned car. They discover Agent Gardiner's body in the trunk and a thumb drive on his body. Looking to protect Kiera, Carlos takes the drive while Rosicki gives him one hour before calling in Gardiner's body.
Emily begs Escher to let her out of her contract. He offers her an out, but only if she brings him the sphere from Alec's lab. Before she can get there, Kellog corners Emily on the street. Knowing her true identity, he blackmails her: she must persuade Alec to restore his work on ARC or he'll blow her cover. At the lab, Emily is ready to bail, as her past has caught up with her. Astonishingly, Alec offers to escape with her.
Meanwhile, Carlos inspects the drive recovered from Gardiner's body. On it are a convincing number of files painting Kiera as a Liber8 terrorist. He gives Kiera the heads up - and more importantly, a head start - about Gardiner's murder. Kiera steers clear of the precinct.
Just as Emily and Alec are about to leave, Alec gets the results of his paternity test, learning that Jason is his father. Before he can process the news, Travis bursts into the lab on a tip from Kellog, overpowering Emily and holding her hostage.
Dillon and Agent Lewis find out that Carlos withheld evidence in Gardiner's murder. Lewis delivers him an ultimatum: either he delivers Kiera in 24 hours or she'll be labeled Liber8 terrorist and worse, Carlos will be arrested on federal obstruction charges. He agrees, but pleads to bring in Kiera on his own. Lewis agrees but places a tail on him.
Travis demands that Alec reactivate his CMR. Kiera's attempt to bargain with Escher for the antimatter technology fails. She hears Alec in trouble, and heads to the lab. As Alec goes to reboot Travis's CMR, he overloads his system instead, overwhelming Travis. Alec and Emily use the opportunity to escape the lab. As Travis recovers, he steals Elena's CMR suit. By the time Kiera gets to the lab, everyone had fled.
She tracks down Kellog who reveals the truth about Emily and that Escher is in fact, their common enemy. Alec calls her and tells her they're going to hide out at Jason's place. Kiera has Kellog call Carlos (since CSIS is on to her) to have him meet her there. Carlos manages to ditch his tail.
At the hideout, Alec finally talks to his father for the first time since he was a child. Jason is evasive and sometimes confused about Alec's revelation, but admits he had to leave in order to protect his son. Feeling trapped, Emily comes clean to Alec, revealing everything about her assignment. When Alec shows Jason the sphere, he warns it's a beacon for Freelancers.
Kiera and Carlos arrive guns drawn on Emily, but Alec already knows the truth. Confused Emily wants to know why the sphere is so special. Despite Kiera's protestations, he divulges it's for time travel and Kiera, Liber8 and Escher are all time travelers. He hands the sphere to Emily for her to destroy. Before she can, Warren, Miller and other Freelancers ambush them. Warren hastily disables Kiera's CMR suit.
Kiera, Carlos, Emily and Alec fight their way out of the building as Jason flees. They may their way to the roof. Carlos manages to knock out Warren while Emily and Kiera are trapped under heavy fire. Emily lobs the sphere off the roof, getting shot in the process. Kiera, desperate to save her only means of getting home, dives off the roof to retrieve the device as it rolls along the corrugated rooftops. It comes to rest intact on the ground. She takes it, but knows it's safe at a great cost. On the roof, Alec comforts Emily as she dies in his arms. Furious anger burns in his eyes.
Kiera returns to the lab to reboot her CMR suit herself. She hides the sphere in a container.
Driven by rage at watching his love die, Alec marches into PIRON headquarters to confront Escher once and for all. Watching him from his computer screen, Escher casually tells security: "Send him up."
Alec, Kiera, and Carlos talk about blurring the lines between good and evil.
In 2077, Alec Sadler layers the plans to right the devastating wrongs of his legacy by sending his son to ensure that Liber8 travels back in time.