By Stephen Phelps. Matthew Coleman, Professor of English, has a sideline developing the art and science of linguistic forensics. When a cut and dried murder case is suddenly called into doubt, the language of interviews and confessions becomes primary evidence. Mathew Coleman ...... Mark Strong Anya Hill ...... Lizzy Watts John Carsley ...... Dan Starkey Mark Eason ...... Lloyd Thomas Lynn Eason ...... Sally Orrock Armstrong ...... Ben Crowe Sayers ...... Chris Pavlo Directed by Jessica Dromgoole.