- Robert Katzscreenplay
- Rod Serlingadaptation
- Morris Westnovel (as Morris L. West)
- Paul L. Smith(as Paul Smith)
Rest of cast listed alphabetically
- Rossana Canghiari(uncredited)
- Omero Capanna(uncredited)
- Enrico Cesaretti(uncredited)
- Adriana Colombo(uncredited)
- Gitte Lee(uncredited)
- Amedeo Salamon(uncredited)
- Catullo Scuderoni(uncredited)
- Isabella Zanussi(uncredited)
- William R. Formanexecutive producer
- Paul Maslanskyproducer
- Renzo Rossellinico-producer
- Jerry Goldsmithcomposer (music by)
- Claudio M. Cutryeditor (as Claudio Cutry)
- Katina Zinnerco-editor
- Joe Polliniproduction manager (as Giuseppe Pollini)
- Tony Brandtassistant director
- Fernando Valentoconstruction manager
- Giovanni Bonadonnastunts (uncredited)
- Gilberto Galimbertistunts (uncredited)
- Gino Marturanostunts (uncredited)
- Giancarlo Ukmarstunts (uncredited)
- Raffaele Marinogaffer (as Raf Marino)
- Stefano Marinoelectrician
- Patrizia Ceresaniassistant editor
- Wayne Fitzgeraldtitle designer
- Eugene Rizzounit publicist
- Gianfranco Bellinivoice dubbing: Jacques Herlin (uncredited)
- Sergio Di Stefanovoice dubbing: Eli Wallach (uncredited)
- Larry Dolginvoice dubbing: John Steiner- English version (uncredited)
- Micaela Esdravoice dubbing: Sybil Danning (uncredited)
- Vittoria Febbivoice dubbing: Claudia Cardinale (uncredited)
- Sergio Grazianivoice dubbing: Christopher Lee (uncredited)
- Stefano Mondinivoice dubbing: Cleavon Little (uncredited)
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