- Robert Vaughn
- Bill Fenner
- Elke Sommer
- Sandra Fane
- Felicia Farr
- Claire Connor
- Karlheinz Böhm
- Robert Wahl
- Luciana Paluzzi
- Giulia Almeranti
- Boris Karloff
- Dr. Pierre Vaugiroud
- Roger C. Carmel
- Mike Ballard
- Edward Asner
- Frank Rosenfeld
- Joe De Santis
- Jan Aarvan
- Fabrizio Mioni
- Russo
- Wesley Lau
- Neill Carlson
- Bill Weiss
- Goldsmith
- Don Ames
- Reporter
- Don Anderson
- Guard
- Argentina Brunetti
- The Nun
- Dick Cherney
- Agent
- Gene Coogan
- Scientist
- George DeNormand
- Diplomat
- Joe Evans
- Waiter
- Rudy Germane
- Restaurant Patron
- James Gonzalez
- Plane Passenger
- Bhupesh Guha
- Diplomat
- Vinton Hayworth
- Physician
- Robert Hitchcock
- Agent
- S. John Launer
- Mr. Pennyman
- Jim Michael
- Policeman
- E. Jack Neuman
- Prentiss
- Emma Palmese
- Clerk
- Murray Pollack
- Guard
- Jose Portugal
- Policeman
- Tony Regan
- Diplomat
- Hank Robinson
- Plane Passenger
- Victor Romito
- Policeman
- Danny Truppi
- Scientist
- Richard Vitagliano
- Counterman
