Characters played by Dennis O'Keefe
William T. Marshall
Characters played by Ann Sears
Katie Whiteside
Characters played by Anton Diffring
Emile Karnak
Characters played by Patrick Barr
Inspector Madden
Characters played by Vernon Greeves
Larry Shaw
Characters played by Eileen Elton
Melissa Collins
Characters played by Frederick Schiller
Schleigel
Characters played by Jacqueline Curtis
Penny
Characters played by G.H. Mulcaster
Bennett (as George Mulcaster)
Characters played by Gerald Case
Hawley
Characters played by Jack McNaughton
Coroner
Characters played by Colin Croft
Bartender
Characters played by Andy Ho
Houseman
Characters played by Humphrey Morton
Corbey