Reparto

• Marcello Mastroianni — Alex
• Sydne Rome — Nancy
• Hugh Griffith — Joseph Noblart
• Guido Alberti — Priest
• Henning Schlüter — Catone
• Gianfranco Piacentini — Tony
• Christiane Barry — Dresser
• Pietro Tordi — Man-Servant
• Mogens von Gadow — German
• Dieter Hallervorden — German
• Romolo Valli — Giovanni
• Roman Polanski — Mosquito
• Richard McNamara — Charlie
• John Karlsen — Edward
• Livio Galassi — cast
• Alvaro Vitali — Cross-Eyed Painter
• Renate Langer — Naked Girl with Hat (uncredited)
• Carla Mancini — cast
• Nerina Montagnani — cast
• Franco Pesce — cast

Sonido

• Fausto Ancillai — sound re-recording mixer
• Piero Fondi — sound
• Claudio Gizzi — original music composer
• Peter Keen — sound editor

Dirección

• Roman Polanski — director
• Elvira D'Amico — script supervisor

Guion

• Roman Polanski — screenplay
• Gérard Brach — screenplay

Montaje

• Alastair McIntyre — editor

Producción

• Carlo Ponti — producer

Cámara

• Giuseppe Ruzzolini — director of photography
• Otello Spila — camera operator
• Marcello Gatti — director of photography

Arte

• Franco Fumagalli — art direction
• Aurelio Crugnola — production design

Vestuario y maquillaje

• Adriana Berselli — costume design
• Amalia Paoletti — hairstylist
• Giuseppe Banchelli — makeup artist