Claim: Alistair Petrie appeared in Marc Munden's The Mark of Cain many years after joining the National Theatre in 2005.
Evidence: In 2005, he joined the National Theatre, where he stayed for 28 months performing in His Dark Materials, Shakespeare's Henry IV alongside Sir Michael Gambon and David Edgar's Playing With Fire. In 2007 he appeared in Marc Munden's The Mark of Cain, The Whistleblowers and Cranford.