Anthony Horowitz Creator, Writer John Wood Sir Michael Waterford Actor Sandra Voe Mrs Roecastle Actor Bill Paterson Patrick Jamieson Actor Jonathan Slinger Dr. Brian Wrenn Actor Dearbhla Molloy Matron Grace Petrie Actor Michael Kitchen Christopher Foyle Actor Honeysuckle Weeks Samantha Stewart Actor Julian Ovenden Andrew Foyle Actor Shaun Dooley Gordon Drake Actor Simon Woods Greville Woods Actor Geoffrey Freshwater Sergeant Rivers Actor Richard Huw Peter Preston Actor Anthony Howell Sergeant Paul Milner Actor Alexandra Moen Mary Wrenn Actor Jemma Powell Anne Bolton Actor John Lloyd Fillingham Johnny Bridges Actor Charlotte Emmerson Beryl Drake Actor Richard Henders Patient as Jamieson Actor Bennet Thorpe Patient as Foyle Actor Colin Sell Pianist Actor Jill Green Executive Producer Jim Reeve Executive Producer Jeremy Silberston Director