- Peter Lawrence
- Walter Reid
- Rochelle Redfield
- Carla
- Capucine
- The Countess
- Orso Maria Guerrini
- Giorgio, Police Chief
- Vincent Gardenia
- Tassi, the Commissioner
- Alessandro Haber
- Mayor Ganascia
- Donald Pleasence
- Aldo Rossi
- Eddie Constantine
- Alideo
- Luca Barbareschi
- Luca Pompa
- Rossano Brazzi
- Turtle Captain
- Frederick Von Pichler
- Orazio
- Massimo Serato
- Bishop of Siena
- Luigi Mezzanotte
- Alfredo
- Richard Harrison
- Herman Ostermeyer
- Nanni Svampa
- Amadi
- Richard Leaf
- 1st Killer
- Andrea Aureli
- 2nd Killer
- Furio Bilotta
- 1st Rossi's Agent
- Bruno Bilotta
- 2nd Rossi's Agent
- Felice Ceciarelli
- Marini
- Ione Greghi
- Boarding House Owner
- Joanne Thomas
- Commissioner's Wife
- Maria Franchetti
- Fernanda
- Albino Cocco
- Ticket Clerk
- Franco Diogene
- (as Diogene)
- Teresa Flaminio
- Mrs. Walsh
- Salvatore Bugnatelli
- Arab
- Elvio Benucci
- Eagle Captain
- Franco Ticci
- Caterpillar Captain
- Giuliano Ghiselli
- Goose Captain
- Dino Morichelli
- Giraffe Captain
- Sandra Pallottini
- Alfredo's Mistress
- Nichovska Petrosek
- Party Lady #1
- Giovanna Chemeri
- Party Lady #2
- Helleh Schoenhofer
- Party Lady #3
- Rolando Angeli
- Farmer #1
- Assuardo Anselmi
- Farmer #2
- Graziella Petrini
- Farmer #3
