Steve McQueen as Michael Delaney

Siegfried Rauch as Erich Stahler

Elga Andersen as Lisa Belgetti

Ronald Leigh-Hunt as David Townsend

Fred Haltiner as Johann Ritter

Luc Merenda as Claude Aurac

Christopher Waite as Larry Wilson

Louise Edlind as Anna Ritter

Angelo Infanti as Lugo Abratte

Jean-Claude Bercq as Paul-Jacques Dion

Michele Scalera as Vito Scaliso

Gino Cassani as Loretto Fuselli

Alfred Bell as Tommy Hopkins

Carlo Cecchi as Paolo Scadenza

Richard Rüdiger as Bruno Frohm

Anne Libert as Woman in Red (uncredited)

Hal Hamilton as Chris Barnett

Jonathan Williams as Jonathan Burton

Peter Parten as Peter Wiese

Conrad Pringle as Tony Elkins

Erich Glavitza as Josef Hauser

Peter Huber as Max Kummel