- Raymond Pellegrin - Kommissar Caruso
- Raymond Pellegrin - Tony Caruso
- Geoffrey Copleston - Mr. Winterbottom
- Geoffrey Copleston - Henry Winterbottom
- Armand Meffre - Don Gino Carmelo
- Susan Marshall - Lilli Buonocore
- Pino Ammendola - Chewing Gum
- Elio Bonadonna - Thug
- Sasha D'Arc - Thug
- Maurizio Fardo - Cop
- Bruna Feirri - Fernande's Maid
- Raimund Harmstorf - Vasco
- Jacques Sernas - Don Pietro
- Mario Pilar - Leo Voltera
- Alicia Leoni - Chiara
- Max Turilli - Innkeeper
- Stefano Gragnani - Rascia
- Francesca Ferre - Chemist's Assistant
- Albano Bufalini - Cab Driver
- Leonardo De Carmine - Commissar Arresting Clementi
- Roberto Maldera - Vasco Henchman
- Giulio Massimini - Museum's Guide
- Andy Miller - Chemical Specialist
- Marit Nissen - Angela
- Omero Capanna - Vasco's Thug (uncredited)
- Enzo Maggio - Vasco's Thug (uncredited)
- Marco Stefanelli - Vasco's Thug (uncredited)
- Ursula Andress - Susy Kaminski
- Paul Guers - Philippe Brossard
- Michel Albertini - Tony Cilento
- Jean Boissery - Louis Meller
- Ines Des Longchamps - Marielle Mazel
- Bernard Woringer - Yves Lucas
- Bruno Di Luia - Alfons Calet
- Guy Di Rigo - André
- John Rico - Martin
- Giancarlo Bastianoni - Jules (uncredited)
- Marcello Verziera - Vasco's Thug (uncredited)
- Marcello Verziera - Zebra's Thug (uncredited)
- John Steiner - Zebra
- Isabel Russinova - Edith Fenoglia
- Jean-Paul Muel - Dr. Christiani
- Stefano Antonucci - TV Host
- Mauro Bosco - Fausto
- Paolo Casella - Visitor at Presentation
- Domenico Fiore - Fred
- Donald Hodson - Dr. Degrune
- Mario Erpichini - General
- Sandro Moretti - Dr. Nardi
- Vanni Materassi - General
- Mohamed Badrsalem - Zebra's Thug (uncredited)
- Massimo Ciprari - General at Presentation (uncredited)
- Alfonso Giganti - Policeman (uncredited)
- Franco Ukmar - Zebra's Thug (uncredited)
- Michel Constantin - Xavier Baudin
- Pascale Roberts - Mado
- Venantino Venantini - Pierre Legrand
- Jean Badin - Tonton
- Sergio Smacchi - Brossard's Thug (uncredited)
- Sergio Smacchi - Zebra's Thug (uncredited)
- Sergio Smacchi - Roth's Thug (uncredited)
- Giuseppe Marrocco - Conference Member (uncredited)
- Giuseppe Marrocco - Man at TV Recording (uncredited)
- Pierre Hatet - Colonel Berthier
- Daniel Langlet - Daniel
- Géraldine Pailhas - Blanche
- Bruno Alias - Conference Member (uncredited)
- Luciano Zanussi - Conference Member (uncredited)
- Hartmut Becker - Alfred Merkl
- Josef Fröhlich - Werner Kraus
- Claus Ringer - Wolf Roth
- Robert Sommer - Kraus' Assistant
- Mariangela Giordano - Maria Merkl
- Mimmo Sepe - Ajello
- Maria Grazia Bon - Mrs. Kraus
- John Armstead - Hotel Employee
- Werner Asam - Hans
- Andreas Borcherding - Blackmailer
- Sally Day - Blonde Woman at Bar
- Gianluigi Pizzetti - Hotel Manager
- Andreas Jung - Peasant's Grandson
- Udo Weinberger - Merkl's Attorney
- Ludwig Wühr - Peasant
- Ole Jorgensen - Mr. Whitecat
- Alan Goodson - Black Friar (uncredited)
- Pietro Torrisi - Roth's Thug (uncredited)
- Claudio Zucchet - Roth's Thug (uncredited)
- Mario Cecchi Gori
- Vittorio Cecchi Gori
- Karel Svoboda
- Guido De Angelis
- Maurizio De Angelis
Bud Spencer interpreta a Jack Clementi en la serie.
Capítulo disponible en las siguientes plataformas:
