Sir Robert Brackenbury / Earl of Surrey
Duke of Exeter / Mayor of York
Lord Say
Earl of Salisbury / Sir William Lucy
The Major
Count Brisini
TV Announcer
Insp. Davis
Detective Inspector Minter
Kenneth Palmer
Mark Roper
Dr. Erasmus Potter-Shine
Anthony
Ivan Mason / Dr. James Paxton
Duke Popplewell
Group Captain J. N. H. Whitworth, D.S.O., D.F.C.
Peter Tanner
Detective Grey
Tony Teale
Sergeant Wilson
Bruce Banning
Stephen, Author
Jim Medway
Gerald Ryton
Sgt. Peter Burden
Maxwell Oliver
Captain Jumbo Hoyle
Joe Marsh
Robert Graham
Pemberton Grant
Jack Williams
Denys Royd
Laurie Baxter
Dallas Chaytor
Hans Glaser
Minor role
Minor Role