cast
- Richard Johnson
- Geoffrey
- Honor Blackman
- Julie
- Jeremy Kemp
- Riker
- Peter Vaughan
- Johann
- Roy Dotrice
- David
- Jack May
- Seekert
- Kenneth Cope
- Flag Officer
- Tony Caunter
- Elton
- Clifford Evans
- Admiral Tringham
- James Falkland
- Patrol Boat Lieutenant
- Guy Doleman
- Patrol Boat Commander
crew
- Don Chaffey
- Director
- Fred Engel
- Producer
- Geoffrey Jenkins
- Book Author
- Marvin H. Albert
- Screenwriter
- John Wilcox
- Cinematographer
- Tristram Cary
- Musical Direction/Supervision, Composer (Music Score)
- Alastair McIntyre
- Editor
- John Stoll
- Production Designer
- James Shields
- Sound/Sound Designer
- Bill Warrington
- Special Effects
- Nick Allder
- Special Effects
