David Callan

Edward Woodward

Hunter

Eric Porter

Katherine Schell

Schneider

Carl Möhner

Jenny

Catherine Schell

Toby Meres

Peter Egan

Lonely

Russell Hunter

Waterman

Kenneth Griffith

Dr. Snell

Clifford Rose

The Greek

Michael Da Costa

Liz, Hunter's Secretary

Veronica Lang

Arthur

David Prowse

George

Don Henderson

Padilla

Nadim Sawalha

Wireless operator

David Graham

Security porter

Yuri Borienko

Smart Security Man

Peter Symonds

Shabby Security Man

Raymond Bowers

Policeman

Joe Dunlop

Old lady in the Strand

Mollie Maureen

Flag Lady

Anne Blake

Police frogman

Jack Silk

Man outside Tower Hill Station

Guy Standeven

Man in Street

Lew Hooper

Tom Laughlin