Holiday splendor and masked merriment collide in this beloved yuletide special featuring all-new jaw-dropping surprise performances from Season 10 contestants, spectacular sing-along fun from Masked Singer alumni and The Masked Singer carolers.

The voting results from the top nine live performances are revealed; four artists are voted through, and five perform for the instant save; five make it to the live finale to compete for the title; John Legend and Niall Horan perform.

Guest: Alyson Hannigan.

After the Muon data reported a compelling target in the cavity known as Aladdin's Cave, a void where high traces of gold and silver have been found, the team discovers what appears to be man-made entrances and exits into the curious cavern.

Hunter is determined to find the person responsible for his overdose, Simone confides in Priscilla, Sam and Max interrogate a Rakudushi soldier, and Jason reveals his intentions to Victoria.

Comic Percy Rustomji joins Nev in helping Genesis find Jerison, a man she met 12 years ago on Facebook and with whom she recently reconnected.

Dot creates diversions, Roy meets his match and Indira helps a new friend.

When a Black man goes missing, his family turns to M&A, but suspicions begin to swirl when he's implicated in the disappearance of a white woman. Gabi digs in on her search for Annie, the girl she saw at the cabin. Sir reveals why he kidnapped Gabi.

Alec Ingold is nominated for the Walter Payton NFL Man of the Year Award as the Dolphins prep for a Monday night home game vs. the Titans.

Kal Penn reports on Donald Trump's immunity case heading to the Supreme Court, Grace Kuhlenschmidt settles the abortion-rights debate, and Vir Das talks about his stand-up special "Landing".

Jimmy gives away a holiday sweater to a lucky audience member in 12 Days of Christmas Sweaters before speaking with guests Hugh Grant and Sydney Sweeney and welcoming Tate McRae for a musical performance.

Stephen welcomes actress Taraji P. Henson and a musical performance by Jason Isbell & the 400 Unit.

Hilda and her mother go on a camping trip, but Johanna suspects she's visited this forest before. Does the forest remember her, too?

Darby uncovers the secret retreat within the retreat. In the past, she and Bill come face to face with the Silver Doe Killer.

Before the big bonfire, Jackie learns about Cole and Alex's history with another girl. At the party, relationships new and old go up in flames.

In this Christmas special, Romesh and the gang are joined in the studio for festive fun and games by Manchester United and French International legend Patrice Evra as well as award-winning comedian Rob Beckett. Together, the gang make a special visit to Brentford FC to cook up a Christmas lunch for the players.

While the Lazarus team is trying to find its way back to 2012, Janet is already there, hard at work with Dr Gray.