Guest Stars James Grout as Chief Superintendent Strange Richard Hampton as Coroner Samantha Bond as Helen Marriat Thomas Craig as Desk Sergeant Dominic Keating as Murray Stone Lesley Vickerage as WPC Adrian Dunbar as John Marriat David Haig as Peter Rhodes Joanna David as Susan Fallon Martyn Waites as Duty Constable James Walker as Henry Fallon Richard Pasco as William Bryce-Morgan Christopher Owen as Solicitor James Grant as McGregor Susan Jane Tanner as Nurse Rogers Michael Tomlinson as Constable Tony Mathews as Pathologist Alexander John as Court Official Roger Frost as Photographer Greer Gaffney as Henrietta Fallon Vincent Pickering as Telephone Exchange Man Brendan O'Hea as Telecom Engineer Uncredited Colin Dexter as Man at Reception After Schubert Concert