Lt. Scott and Camile return to Earth via the communication stones to spend time with those they left behind. On the Destiny, the crew explores new sections of the ship and discover a promising Ancient device.

Lois is kidnapped by Tess and forced to reveal what she learned during the weeks of her disappearance. She witnessed a future with Metropolis controlled by Zod and Clark left without his powers because of the red sun. With this information, Clark makes a big decision about Zod.

Don and the team needs help from convict John Buckley when robbers hit a diamond exchange and take hostages. They believe the robbers are copying Buckley's criminal strategies.

supposedly a major cast member dies tonight...

Bailey's father (Frankie Faison) visits for the holidays, and he voices his disapproval of her life choices. Meanwhile, a woman from Mark's past shows up, complicating things with Lexie; and Meredith defends the Chief when he's criticized by Thatcher (Jeff Perry). Teddy Altman: Kim Raver.

An unusual abduction in Boston reveals information about the Observer and bizarre evidence that Walter, Peter and Astrid must sort out in the lab---in between Walter's constant cravings for a milkshake.

Sam, Dean and Castiel search for Lucifer (Mark Pellegrino) in order to send him back to Hell. They are aided in their dangerous quest by fellow hunters Bobby, Ellen and Jo. Bobby: Jim Beaver. Ellen: Samantha Ferris. Jo: Alona Tal.

A murder at a bowling alley is investigated after an unusual piece of evidence is discovered during a bowling tournament.

Damon learns some surprising information about the town's founding families, and Elena makes a devastating discovery that adversely affects her relationship with Stefan. Meanwhile, Jeremy resumes a hobby of drawing fantasy creatures that he had abandoned after his parents died.