Leslie Norman Director Joseph Losey Director Dean Jagger Dr. Adam Royston Actor Leo McKern Insp. McGill Actor Edward Chapman John Elliott Actor Marianne Brauns Zena Actor William Lucas Peter Elliott Actor John Harvey Maj. Cartwright Actor Peter Hammond Lt. Bannerman Actor Michael Ripper Sgt. Harry Grimsdyke Actor Anthony Newley Lcpl. "Spider" Webb Actor Ian McNaughton Haggis Actor Kenneth Cope Sapper Lansing Actor Edwin Richfield Soldier Burned on Back Actor Jameson Clark Jack Harding Actor Frazer Hines Ian Osborn Actor Neil Hallett Unwin Actor Anthony Hinds Producer Jimmy Sangster Writer Michael Carreras Executive Producer Gerald Gibbs Cinematographer James Needs Film Editing