Anna Chancellor

At first, this new comedy goes through the motions with a depressing lack of imagination. Its main characters - nice virgin; crass, gawky, showboating virgin; swotty PC girl who secretly loves nice virgin; posh, bright girl who's rebelling against her parents - are archetypes from American films, unaltered. Real teens are a lot more diverse, and funny.

But the title tells you this is a set-up episode. The booze-fuelled fumble in the middle will spawn a baby. Can Pramface step up and grow up? Someone thinks so, because they've splashed out on Anna Chancellor and Angus Deayton as the parents at war. And the young actors are blameless. Pramface could still recover from its inauspicious start.

In Pramface (BBC3) a potentially clunky premise - two teenagers' drunken sex at a party leads to a pregnancy neither is ready for - is saved by cunning casting and a funny script. Sean Verey as 16-year-old father-to-be Jamie has scarcely lost his puppy fat, while as 18-year-old mother-to-be Laura, Scarlett Alice Johnson looks and plays like a young Harriet Walter - as hard as nails in dealing with her convincingly useless parents (Angus Deayton and Anna Chancellor), yet as brittle as pressed flowers with everyone else. I loved Jamie's loser friend's hopeless sex playlist - 50 Cent followed by the Top Gear theme tune. Although Chris Reddy's plot is full of holes (would Laura, after discovering she's pregnant, really make her first phone call to the shag buddy whose face she can't recall?) there is enough in this too-much-too-young comedy's opening episode to justify a second date.