Peter Serafinowicz, Mathew Horne and Kylie Minogue star in this comedy-drama about the cast of a new Andy Warhol musical putting up with Serafinowicz's monstrous star turn, until the theatre's mysterious cat gets involved. Actor Marc Warren writes and directs a delightful tale of the unexpected, and Serafinowicz has the time of his life swanning about in Warhol's wig. Another treat tucked away on Sky Arts. Keep an eye on them: turn your back for a second and you could miss a gem.

Mathew Horne: I talked Kylie into being a man-eater

Gavin & Stacey's Mat Horne roped in an old pal to play a saucy actress in his latest TV project - Kylie Minogue.

They gave us Jon Hamm and Daniel Radcliffe sharing a bath in A Young Doctor's Notebook and now we've got Kylie Minogue gyrating to The Velvet Underground - Sky Arts' Playhouse Presents... certainly has pulling power.

In Hey Diddly Dee, a star-studded cast - Mathew Horne, Peter Serafinowicz, Homeland's David Harewood sporting a Brummie accent - find themselves caught up in a theatrical black comedy which trips them back to Andy Warhol's Factory glory days, with a potentially fatal clash of ego and ambition.

Oh, and a scene-stealing black cat.

Mathew Horne: My family values

The actor talks about his family.

Jack Whitehall's Bad Education ended as it began, a baffling mix of great lines ('Pol Pot and Paul Potts, I always get those two mixed up') and misfiring scenes even Waterloo Road would have thought twice about. Still, it's worth a second term, if only to find out who's living in Mathew Horne's hair.

One of the chief joys of Jack Whitehall's sitcom is the superb supporting cast. Mathew Horne plays the tragically uncool head teacher, who longs to be everyone's best mate, to the chagrin of his cringeing staff. Equally hilarious is Green Wing's Michelle Gomez as the menacing, maroon-lipped deputy head who dreams of running the school like a concentration camp. Finally, there's Sarah Solemani as the hippy art teacher who loses her rag after our hapless hero, Mr Wickers, hijacks the school elections.

Once again, the gags come thick and fast in Abbey Grove School. The teachers scratch their heads, unsure what to do when the pupils become aggressive after playing a violent video game. Luckily, Jack Whitehall's character, hapless history teacher Mr Wickers, has a cunning idea: a weapons amnesty.

Of course all he really cares about is impressing comely teacher Miss Gulliver, so he orders his wide-eyed class to procure as many weapons they can, to ensure it's a success. When his master plan backfires, the dodgy headmaster (Mathew Horne) hires an even dodgier self-defence teacher. Cue a painfully funny scene in which our hero has to be rescued by his pupils.

Comedian Jack Whitehall, panel-show guest and star of Channel 4's student comedy Fresh Meat, has also co-written this new comedy in which he plays a posh teacher in a comprehensive school. We're three episodes in now and the schtick is working well. The humour emanates equally from the pupils and the teachers, in particular immature Alfie (Whitehall) and desperate-to-be-cool headteacher Fraser (Mathew Horne). Tonight a violent video game, Tokyo Sin, is causing consternation among the teachers at the school, with Alfie telling his game-obsessed students, "We had crazes too [at school]... we had Pogs [cardboard playing discs]."

It's not just the presence of (the slightly underused) Michelle Gomez that has us thinking of Green Wing in relation to this very funny school sitcom. People with serious jobs behaving in ridiculous and irresponsible ways is a comedy staple. And Jack Whitehall and, particularly, the revelatory Mathew Horne have struck gold here. Tonight, sex education is on the agenda as the impending arrival of a horde of carnally voracious French exchange students concentrates the minds of staff and parents alike. But is self-styled 'Sex Yoda' Alfie (Whitehall) quite the man for the job? 'I've been sitting in my room, getting to know my penis,' he announces to a roomful of horrified students. If it didn't feel like damning with faint praise, we'd call this one of the best comedies BBC3 has ever screened.

Two episodes in and already this Green Wing-esque school comedy starring Jack Whitehall as a posh slacker (what else?) is dipping its wick into sex education. The subject is handled amusingly and imaginatively enough - though we still can't decide if we love or hate Mathew Horne's right-on headmaster and his 'groovy banter'.