Xander, Ralen, and Jett finally return to Earth, only to find it completely devoid of life with the exception being a mysterious and amnesic Jax. Now they will need to work together to unravel the strange mysteries of this surreal world.

Odd couple Skinner and Chalmers embark on an 800-mile car ride to Cincinnati to attend an administrator's convention. But whether they reach their destination without killing each other first is anyone's guess.

Talon deals with difficult emotions as death seems to be the only answer to save her friends. The Outpost becomes a fight arena as an old enemy releases a dark power into unsuspecting hands.

As Henry loses himself to madness, the stakes have never been higher for Katherine - her husband has become a threat to her life.

A series of setbacks causes a member of the group to reevaluate their role in the mission; someone makes an amazing discovery. A surprising revelation casts everything in a new light.

Haley challenges her own ethics in her defense strategy. As the courtroom theater mounts, Grace takes measures to protect herself and her family.

When Linda's parents have a layover at an airport nearby, Bob and Linda attempt to turn it into their annual "visit".

Aliyah Royale, Nicolas Cantu, Nico Tortorella, Alexa Mansour, Matt Negrete and Hal Cumpston discuss "The Deepest Cut" and "In This Life" from "The Walking Dead: World Beyond.

Josto gets revenge, Oraetta comes clean and Ebal teaches Loy a lesson about business.

A divided group struggles to get together. Others turn to the greater good.

The team learns about the program's budget cuts and what impact they will have on their mission. When Elon Musk's SpaceX sets up camp right next door, Cap, Skip and Rook are convinced they've discovered a solution to their problems.

Slater and Aisha have to toughen up the Bayside football team. Jessie takes Daisy under her wing.

Dot gives a dramatic math lesson.

Mel endeavors to help an uncooperative Charmaine get hydrated while thinking about what transpired with Jack. Calvin offers Brady a new job.

Scrooge teams up with his archrival, Santa Claus, to save Christmas, while Webby discovers the true history behind their infamous feud.

Victoria Coren Mitchell hosts as first-round losers the Whitcombes and the Severns get another chance to stay in the competition and reach the second stage. The contestants must use patience, lateral thinking and sheer inspiration to make connections between four things that may appear at first not to be linked, with one set of clues comprising Picacho Peak, La Brea Tar Pits, Sierra Nevada Mountains, and Rio Grande River.