Legendary hammer-bot Beta returns to face off with Rotator, one of the deadliest horizontal spinners on the planet. Later, two rising stars attempt to stake their claim in the contest as Gruff pits its duel-flamethrowers against Hypershock.

Dale and Meemaw work out relationship issues while playing Dungeons and Dragons with Sheldon and Missy. Also, Mary and George take a trip with Coach Wilkins and his wife, and Georgie freaks out when his girlfriend thinks she's pregnant.

Andy and Sullivan find a way to stay connected. Ben confronts a tough loss. Jack and Inara grow closer. while off duty, the crew jumps into action to help a mother in distress, but their heroic efforts spark conflict with police officers.

When the "Captain Trips" flu epidemic wipes out more than 99% of the population, the remaining few immune to the disease, including Stu Redman, Frannie Goldsmith, and Harold Lauder, set out in search of other survivors, all the while, experiencing visions of the nurturing Mother Abagail and the menacing figure of The Dark Man.

Georgiou uncovers the truth about the plot against her, leading her to a revelation about how deeply her time on the U.S.S. Discovery changed her.

After Ben recommends Wade for a job on the same work site he's on, they are surprised by their wildly different professional styles. Also, Delia is struggling to not be so judgmental about how Michelle is raising her kids.

Drew downloads a tracking app to keep an eye on Gina after he begins getting concerned about her reckless behavior.

Bonnie is concerned about Adam's safety when he decides to go skiing for the first time since his accident. Also, Tammy worries that Jill is sending the wrong message to the young girls they're mentoring.

Grey Sloan Memorial faces new pressures as Seattle Pres is overloaded, and Grey Sloan Memorial is now on surge capacity protocol. Meanwhile, Owen and Amelia are faced with one of the most controversial surgeries of their careers.

Eddie's injuries put a strain on his marriage as he secretly continues to manage the pain from the accident. Meanwhile, Rome struggles with his movie and finds an ally in Shanice; and Maggie continues her journey in England as she and Jamie grow closer than ever.

Conan welcomes guest Sienna Miller.

Jimmy welcomes singer-songwriter Paul McCartney, actor Pedro Pascal, and a musical performance by The Voidz.

Stephen welcomes actor George Clooney and a musical performance by Black Pumas.

Armed with sports cars, Richard, James and Jeremy think they are in for a cushy road trip as they arrive on the exotic island of Reunion and race on the world's most expensive piece of tarmac. But a bizarre challenge propels them to Madagascar where they must tackle the world's toughest road.

David confronts his many fears when he stumbles into a ferocious battle during an overnight Sparrow Scouts camping trip with Hilda and Frida.

Brain is humbled by his future self.

Cynthia is in disbelief as she has finally caught Malcolm and Sarah in their long-standing affair. Ruth shares troubling news with Oliver about what really happens when the girls leave with Lilo. The Highest and River's relationship grows as Dikahn's dislike for River grows. Sheriff Conley reviews security footage and sees that Deputy Poke had sex with Melinda in his office. A few Rakudushis members band together to plan an escape.

Cassie comes face to face with Alex's killer. Annie works with the FBI. Megan comes clean.

To get back in her family's good graces, Tumi looks for the missing best man. Against their better judgement, Tumi and Beauty seek out a family member.

Roi decides to do some investigating of his own. Raquel starts turning to an unlikely source for comfort. Iago continues to seek attention from Viruca.

Neveah urges the troupe to rise up against Ramon, while June battles her mother for emancipation. Bette tries a new tactic to score pills.

As the killer continues to prey upon women, police hope that tire tracks and a victim's 5-pound note may finally lead to a suspect.

A tidal surge forces the castaways to relocate their camp. Still suspicious of the island and how they got there, Leah turns her paranoia on one of the other girls, viciously accusing her of knowing more than she's letting on. In flashback, Jeanette's astonishing backstory is unveiled.

Tensions inside the resort reach a boiling point. As the game clock nears zero, those who've survived the onslaught now face an uncertain future.

James welcomes actress Gal Gadot, and a musical performance by Smith & Burrows.

Graham is joined by George Clooney, Michael Sheen, David Tennant, Viola Davis and Vanessa Kirby, and Michael Ball and Alfie Boe perform Have Yourself a Merry Little Christmas.