 He plays guitar and cello, and has worked with the London Sinfonia.Cowan's television credits include "Judge John Deed", "Ultimate Force", "Jonathan Creek", "Poirot", "Foyle's War", "The Ruby in the Smoke", "Lost in Austen" and the television movie "The Project", 2009 Agatha Christie's Miss Marple 'They Do It With Mirrors' as Wally Hudd.He also appeared in a 2009 commercial for Women's Aid.