Backstabbing and dissention run rampant in one tribe as a castaway reveals that old grudges die hard and makes a move to put a former ally on the chopping block. Meanwhile, one Villain pushes so hard to provide for the tribe that he passes out cold.

Realizing they're the only ones who believe their client is innocent, Dylan and Liam form a bond together. Meanwhile, Addy's long-distance boyfriend arrives unexpectedly with a plan of his own.

Derek reinstates hospital lectures, leading the doctors to recount stories of their past - Bailey tells of her days as a timid young resident, Callie reflects on a polio case, and Richard recalls an AIDS patient he treated with Ellis.

When two old acquaintances of Michael's show up, it is up to him to clean up their messes.

When two people share the same flashbacks/regressive episodes, Kate, Price, Malachi and Rishi discover the couple are star-crossed lovers who rediscover each other in each life, and the team must go to great lengths to keep the pair from fulfilling a destructive pattern.

The designers have to think small this week as they design an outfit for a child model. Later they are told that they also have to design a companion outfit for their adult models.

Naomi, Addison and Pete try to save a premature baby. Cooper thinks Charlotte's new boyfriend is abusing pills.

The Important Thing discussed in this episode is the Important Thing of Strategy.

When a bomb threat jeopardizes the maiden voyage of the luxury airship Excelsior, Archer and the ISIS crew must battle the clock (and each other) to avert disaster.

Sarah sues the film Home Alone for prompting her to kill her new neighbor. Meanwhile, Brian tries to get even with a bird that keeps crapping on his head.

The panelists on this episode are Jo Brand, Rob Brydon and Sean Lock.

Jimmy Carr and team captains Sean Lock and Jason Manford together with celebrity guests David Walliams, Rhod Gilbert, Lauren Laverne and Janice Dickinson put the world to rights.

A bit of everything on this week's show... an Irish actor, a Russian model, an English comedian and an American rap superstar. What more could anyone want?