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.

A man is kidnapped and initiated into a tribe who live hidden within the local garden center, a toothbrush company which is desperate for fresh ideas to keep sales up, another episode of "Numberwang" - in German.

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.

An estate agent shows a couple around an unusually damp property, a magical clarinet with the power to make people reveal embarrasing secrets, comedy partners Fish and Chip and their peers, Pin and Cushion.

Stone age forensic science, an eccentric TV historian who takes his passion a little too far, another edition of "The Surprising Adventures of Sir Digby Chicken-Caesar", in which Sir Digby finally ends up in prison.

The heroic Helivets, who claim they can save any pet in peril, a director whose art mimics life, and a doctor struggling to fit in on the innuendo-laden wards of the Carry On Hospital.

The UN turn their attentions to Bill Oddie while a sexy scarecrow is a rival for one woman's affections.

Two German soldiers wonder if they're the baddies, Angel Summoner and BMX Bandit, Numberwang, Snooker commentators Terry and Peter, How Not What to Look Like, an incredibly posh person who is a waiter, Big Talk, Emergency Medical Treatment, inviting James Bond to a party, Dreamy Pastures Insurance, Banana Dance, Sir Digby Chicken-Caesar continues his battle against his nemisis by posing as scalpers outside Mumma Mia.

Daytime Television, an evil supervillain who likes to talk in euphemisms, Biscuit Telekinesis

A dinner guest who has an unusual method of dealing with bores, three millionaires having trouble giving away their yachts, and an episode of "Big Talk", in which the panel discuss the concept of God.

This programme reveals the true purpose of the Giant Death Ray, presents a gangland villain made of wood, and offers dating advice from a man who is almost Gary Rhodes. Plus a look back at the careers of Ted and Peter, Britain's least successful professional snooker players, in Screw Back in Anger, and an introduction to the world's least politically correct superhero.

Mr Darcy demonstrates his prowess to Miss Bennett at Freestyle Disco; there's an introduction to Glucozade Port, the world's first alcoholic isotonic drink; and a carnivorous man at a vegetarian dinner party points out that the cat looks lean and gamey. Plus a new adventure for drunken super-sleuth Sir Digby Chicken-Caesar; an unnecessarily honest best man; and David and Rob find themselves in an awkward situation with the Queen.

Comedy sketches, featuring the secret of the universe being revealed in a melon, a butler who has had a 30-year misunderstanding with his employer, and the wise words of a soothsayer in Pompeii. Plus, long-suffering Hennimore deals with a giant wasp.

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.

A historian has trouble controlling his arms, a supervillain gets bogged down in health and safety, the world's least politically-correct pant, a look behind the scenes at the admirable work the comedy duo do in the local pheasant hospital.

The first ever daytime talk show, a visit to Park Flamingo World, and a discussion on Virginia.

A teenager dying of embarrassment, and a couple have the chance to buy the gateway to Narnia. Plus practical joking amongst scientists.

There's a chance to see the world's least successful replacement for the doorbell, a game show from after the apocalypse, and Queen Victoria's unusual objection to a tree. Plus Santa's ne'er-do-well brother Russ returns to the North Pole.

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.

Features some unusual telephone services, including all of Wagner's operas by text; some people have a bit of a problem with a giant evil robot; and Rob gives David a less-than-relaxing massage. Plus Barbieri, the 15th century's finest inventor comes up with the tin opener, just 500 years before the invention of the tin; and two Victorian brothers find their final farewell doesn't take as long as they expected.

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.

A robot, a reality TV show based on reanimated corpses, and another of the sensitive documentaries: this time about a man named Alan and his nineteen penises.

Comedy sketches, featuring a pair of cellists who want to build an airport, some bad news about toast, and the secret behind the futuristic cult of Vectron. Plus, an instalment of police drama Bussman and Christmas, starring an old-school cop with a sherry problem.

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.