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David Mitchell and Robert Webb are back for a fourth series of their brainy but daft sketch show. Find out the correct but confusing way to talk to Caesar; there's a great new way to spot the emotional subtext in TV drama; and there's a man who is very angry about grammar - and he has a gun. Plus there's a chance to meet David's surprising new wife.

There's a man with a very very tiny office; you can hear the conspiracy behind the conspiracy behind the fake fake moon landings; and you can find out how to get cash for any unused plutonium you have around the house. Plus Ted and Peter are here to bring you all the excitement of Late Night Dog Poker.

More sketch comedy from the quirky world of David Mitchell and Robert Webb. This time Gilbert and Sullivan announce their new opera about a maverick cop - No Nonsense Harry; a very serious actor has a bitter argument with his moustache; and at last the invention of the domestic jetpack! Meanwhile, behind the scenes, David is selling a brand new kind of biscuit.

Featuring Bavaria's most popular statistics-based entertainment show, Reports Mode; a TV chef travels round the world in a balloon - with a hostage; and how the Ku Klux Klan really got their name. Plus how a glass-and-a-half of wine can solve almost all the world's problems.

Featuring a modern-day Cyrano de Bergerac explaining how to read a love poem to a woman addicted to EastEnders and a documentary about documentaries. Plus, a furious argument about christenings and a novel way to end a sketch show.

More sketches from David Mitchell and Robert Webb's lop-sided world. Featuring an evil robot in disguise, and a very old Sherlock Holmes with Watson by his side. Plus, how to make sure your family is eating enough cat, and why you can't do shop sketches anymore.