- Richard Travis
- Tom Norman / Rattick
- Helen Westcott
- Mary Lynn
- Emory Parnell
- Capt. Jan Roburt
- Richard Fraser
- Operative Farrell
- James Griffith
- Operative Dale
- Ralf Harolde
- Steele
- Selmer Jackson
- Capt. Wright
- Gene Roth
- Ehrlich
- William Tannen
- Dajek
- Otto Reichow
- Balser
- Pierre Watkin
- Mr. Sigmund
- Paul Bryar
- Cmdr. Braddock
- William Haade
- Anorus
- Jason Robards Sr.
- Dr. Loring
