Daniel leads the Berlin Station crew in piecing together evidence that will illuminate Langley’s role in the Iosava rendition. Meanwhile, Hector takes a new approach to atoning for bad behavior. And as the episode draws to a close and the truth comes into focus, the Shaw mantle is passed.

When Watson is implicated in a DEA investigation into doctors writing illegal prescriptions, she and Holmes search for the person using her medical license to sell drugs.

At a Republican convention, Graves enlists Isaiah’s help to quell dangerous rumors about Margaret’s relationship with Jonathan Dalton. Margaret manages infighting among her team as she prepares to officially announce her candidacy at the convention. Olivia and Jeremy feel the pressure as the FBI starts asking questions about their connection to Arturo. Treadwell escapes his security escort and leaves his mother’s hospital room on a mission.

The acclaimed drama concludes. In the aftermath of the Silo tragedy Karen feels she and Sam have no future and takes matters into her own hands. Niska and Astrid prepare to return to Berlin, but can Niska really walk away from her family? Joe leaves Laura shell-shocked with a frank admission. Hester seeks revenge and will stop at nothing to hurt Leo.

When a possible Israel-Iran war threatens the House’s imminent vote on the U.S. presidential election, Elizabeth attempts to bring the two reluctant countries to the negotiation table in an effort to broker a peace between them. Also, Russell’s life hangs in the balance after a heart attack.

A look at the real science that went in to making the landmark series MARS.

Sam partners with Anna and Callen with Deeks as the team investigates the disappearance of a Navy Lieutenant Commander who is working with the NSA on foreign cyber threats. Also, the team celebrates the holidays together

The Gallaghers grapple with the loss of one of their own. As Lip takes steps to improve his future, Debbie, Carl and Liam get roped into Frank's new scheme. Meanwhile, Kev and V get their revenge on Svetlana.

Jonah is not prepared for everyone’s reaction to his training video.

Alison is motivated to spend a memorable day with Noah on Block Island for an unusual reason. Noah is left wistful by their profound connection, until the problems from which he was escaping return with a shocking force.