Comedy preview: Kristen Schaal And Kurt Braunohler: Double Down Hearts, London

Here's another chance to catch this thrillingly freewheeling show from a duo who serve as an example of the very best in envelope-pushing US comedy. Schaal and Braunohler's comic skills are sharply honed following work on South Park and The Daily Show, and they have the same spirit of vicious quirkiness that helps make those shows so distinctive and funny. Double Down Hearts is ostensibly an overwrought play that the pair have devised on the heart-rending subject of harelipped gambling addicts, but it's really an excuse for a ragbag of sketches and knockabout (occasionally literal) horseplay. There's pin-sharp writing, but also improvised moments, like the section where they recruit members of the audience to compete for a date with Schaal - a dubious honour for those familiar with her performances as stalker Mel in Flight Of The Conchords.

Bloomsbury Theatre, WC1, Fri