- Edward Woodward
- David Callan
- Eric Porter
- Hunter
- Carl Möhner
- Schneider
- Catherine Schell
- Jenny
- Peter Egan
- Toby Meres
- Russell Hunter
- Lonely
- Kenneth Griffith
- Waterman
- Michael Da Costa
- The Greek
- Veronica Lang
- Liz, Hunter's Secretary
- Clifford Rose
- Dr. Snell
- David Prowse
- Arthur
- Don Henderson
- George
- Nadim Sawalha
- Padilla
- David Graham
- Wireless operator
- Yuri Borienko
- Security porter
- Peter Symonds
- Smart security man
- Raymond Bowers
- Shabby security man
- Joe Dunlop
- Policeman
- Mollie Maureen
- Old lady in the Strand
- Lewis Alexander
- Restaurant Diner
- Richard Atherton
- Man in Restaurant
- Anne Blake
- Flag Lady
- Derek Chafer
- Chauffeur
- Jeremy Gittins
- Dominic
- Josie Grant
- Barmaid
- Lew Hooper
- Man in Street
- Tom Laughlin
- (uncredited)
- Aileen Lewis
- Restaurant Diner
- Tommy Little
- Barman
- Mary Maxfield
- Woman in Street
- John More
- Man in Library
- Henry Roberts
- Passerby
- Jack Silk
- Police frogman
- Guy Standeven
- Man outside Tower Hill Station
- Reg Thomason
- Man in Street
