Host Cat Deeley reminds viewers that the final six couples will be competing for a place in "your" Top10. We're introduced to the final 12 dancers, followed by judges Mia Michaels, Mary Murphy and Nigel Lythegoe.

Carlos takes us on a trip to a racial theme park. He also uses a time machine to go back in time and help man kind.

Family bonds grow when the Paynes face a health crisis. Elsewhere, Miranda's parents arrive, as a jittery Calvin scrambles to make the visit a success.

Ella, Claretha, Jazmine and Jazmine's friend branch out: They go on a woodsy wilderness trip---and promptly get lost. Meanwhile, Calvin, deciding to pop the big question to Miranda, sets out to find the perfect engagement ring.

The season finale finds the roommates saying goodbye to each other and to Hollywood.

Justin loses his patience with rookie Derek, planting the seeds for an showdown at the Big Dog driller. Wayne and the Viking crew may have a devastating problem with a discovery of a tiny substance. Lastly, Gerald toughens up on his Longhorn team, but a serious injury to a roughneck may cause a tougher problem.

Dara O'Briain and regulars Hugh Dennis, Frankie Boyle, Andy Parsons and Russell Howard are joined by the guests Michael McIntyre and Lucy Porter.