Host Carson Daly reveals who America has chosen to be the Season 24 winner. The star-studded finale includes special performances by chart-topping artists as well as finalist/coach duets.

Guest: Greg Proops.

When Rick and Marty finally get underground in the Garden Shaft for the first time this year, they may be foiled by an ancient booby trap.

Sam's loyalty is questioned when he's caught in an unexplainable situation, and Victoria is nervous the truth will surface now that Jason is back in the picture.

Special guests pair up with former contestants to compete in ingenious holiday-themed challenges.

Ciatta has a bright family future planned with her "perfect man" Juan. But before Nev and Kamie give their blessings on Ciatta's move to LA to be with him, they uncover details on Juan that her life plans into question.

Lorraine calls things off, Gator asks questions, Wayne makes a surprising discovery and Indira offers a new perspective.

Coming off a tough loss to the Titans and an injury to superstar wide receiver Tyreek Hill, the Dolphins look to rebound against the New York Jets.

Expelled from school, Percy Jackson unravels who he is, confronting a world of gods and monsters.

Jimmy gives away a holiday sweater to a lucky audience member in 12 Days of Christmas Sweaters before speaking with guests Bradley Cooper and Martha Stewart and welcoming Rufus and Martha Wainwright for a musical performance.

Stephen welcomes actor Adam Driver, singer-songwriter Jon Batiste, and a musical performance by Jon Batiste.

The Queen gives Charles the green light to wed Camilla. Tasked with planning her own funeral ahead of her 80th birthday, she faces an existential crisis.

After a major miscalculation by Tom in 225 leaves the fate of the Realms in jeopardy, Jun and the riders rally behind Tom and Thunder to face off the World Serpent.

Eric escapes the Lodge's clutches. Axel tries to take hold of the Horror once and for all.

The remaining guests gather and discover the killer among them.

Percy finds his place at Camp Half Blood, where he learns just how special his origins may be.

Carol decides to learn every one of her coworkers' names and makes a discovery that sends her, Luis and Donna on a perplexing odyssey.

A look back at the best unseen moments from the 18th series, featuring regulars Romesh Ranganathan, Jill Scott and Jamie Redknapp.

After successfully arriving in 2012, George and the Lazarus team face their biggest challenge yet as they attempt to rescue Janet and retrieve the time machine.