Stewart Granger
David Porter
Acting
Lex Barker
Glenn Cassidy
Acting
Pierre Brice
Agent Brice
Acting
Karin Dor
Denise (Rio segment)
Acting
Walter Giller
Karl (Vienna segment)
Acting
Johanna Matz
Monique Carrar (Vienna segment)
Acting
Klaus Kinski
Gomez (Rio segment)
Acting
Richard Münch
Professor Alden (Frame story)
Acting
Peter Vogel
Wendt, Suspected girls' killer (Frame story)
Acting
Pascale Petit
Lotty (Vienna segment)
Acting
Agnès Spaak
Nelly Small (Rio segment)
Acting
Herbert Fux
Thug #2 (Vienna segment) (uncredited)
Acting
Harald Dietl
Hans, Thug #1 (Vienna segment) (uncredited)
Acting
Raoul Retzer
Doorman (Vienna segment) (uncredited)
Acting
Margaret Lee
Agent Linda (Rome segment)
Acting
Roberto Miali
Pessana (Rio segment)
Acting
Carla Calò
Female boss (Rome segment)
Acting
Carmen G. Cervera
Joana (Rio segment)
Acting
Allen Pinson
Ray Runner (Rio segment)
Acting
Fregolente
Harry Brenton (Rio segment)
Acting
Kim Camba
Gigi (Rome segment) (unconfirmed)
Acting
Fortunato Arena
Taxi driver (Rome segment) (uncredited)
Acting
Alberto Bonucci
Professor (Rome segment) (uncredited)
Acting
Pietro Ceccarelli
Gangster #2 (Rome segment) (uncredited)
Acting
Spartaco Conversi
Gangster #4 (Rome segment) (uncredited)
Acting
Franco Daddi
Gangster #3 (Rome segment) (uncredited)
Acting
Robert Favart
Sergej (Vienna segment) (uncredited)
Acting
Michael Janisch
Kurt Waldeck (Vienna segment) (uncredited)
Acting
José Lewgoy
President (Rio segment) (uncredited)
Acting
Luciano Pigozzi
Ivan (Rome segment) (uncredited)
Acting