Robbie Coltrane Dr. Edward 'Fitz' Fitzgerald Actor Barbara Flynn Judith Fitzgerald Actor Geraldine Somerville Penhaligon Actor Lorcan Cranitch DS Jimmy Beck Actor Kieran O'Brien Mark Fitzgerald Actor James Fleet Michael Trant Guest Star Colin Tierney Harriman Actor Wil Johnson Skelton Actor Jim Carter Kenneth Trant Actor Maureen O'Brien Virginia Trant Actor Emma Cunniffe Sarah Jennings Actor Cherith Mellor Norma Trant Actor Kelvin Fletcher Boy Actor Julian Jarrold Director Ted Whitehead Writer Sally Head Executive Producer Paul Abbot Producer Ivan Strasburg Cinematographer