Stephen Critchlow (born 16 November 1966) is a British actor, notable for his work in the theatre and appearances on radio series such as Truly, Madly, Bletchley, The Way We Live Right Now and Spats, along with radio episodes of Torchwood (Lost Souls) and Doctor Who (The Nowhere Place). He has also appeared in Kenneth Williams: Fantabulosa! as Kenneth Horne and is currently appearing in the West End version of The 39 Steps.