Non c'è due senza quattro

Terence Hill

Sebastiano Coímbra / Elliot Vance

Bud Spencer

Antonio Coímbra / Greg Wonder

April Clough

Olympia Chavez

Harold Bergman

Double Agency Director

C.V. Wood Jr.

Police Officer

Dary Reis

Van der Bosch (as Dary Reiz)

Nello Pazzafini

Don Tango

José Van de Kamp

Bernardo

Fernando Amaral

Ángel Duarte

Roberto Roney

Nadiño

Ataíde Arcoverde

Vinicio (as Ataide Arcoverde)

Claudioney Penedo

Don Tango's Boss

Dennis Bourke

Albert von Eisenburg

Giancarlo Bastianoni

Tango's Thug / Mercenary (uncredited)

Franco Sattamini

Tango's Thug / Mercenary (uncredited)

Sergio Smacchi

Tango's Thug / Mercenary (uncredited)

Franco Ukmar

Tango's Thug (uncredited)

Carlos Kurt

One of the recruiters (uncredited)