A new sitcom in which a young jazz quartet get trapped in 1926, thanks to a time machine accessed in a council block lift by a chap named Homeless Pete. It's not what you'd call subtle, exactly - were it not for all the swearing and intermittent threat of knife crime, it could be a children's show. That said, this opening double bill belts along entertainingly, with some fun moments of cultural mismatch along the way. Amusing Nigel Havers appearance, too.

Critics' choice: Comedy in 5/4 time

This comedy by Daniel Lawrence Taylor is a few stages past promising, a show with a smart premise and a cast who are charmingly odd, provocative, stylish and silly -- the kind of multitasking few new sitcoms achieve.