John Gilling Director, Writer Lionel Jeffries Col. Judd Actor Oliver Reed Capt. Tom Sylvester Actor Jack Hedley Edward Beverley Actor June Thorburn Claire Judd Actor Michael Ripper Pablo Actor Harold Goldblatt Jacob Actor Duncan Lamont Maj. Bell Actor Clifford Elkin Philip Beverley Actor Suzan Farmer Constance Beverley Actor John Harvey Sgt. Grey Actor Charles Houston Drury Actor Michael Byrne Lt. Hawke Actor John Stewart Beverley Actor Harry Towb Cobb Actor Robert Rietty King Charles I Actor John H. Watson Fitzroy Actor Douglas Blackwell Blake Actor Leslie Glazer Gonzales Actor John Woodnutt Lt. Wyatt Actor Eric Corrie Duncannon Actor Dennis Holmes Chaplain Actor Anthony Nelson Keys Producer