- Bruno Di Geronimostory and
- Bruno Di Geronimoscreenplay and
- Massimo Dallamanoscreenplay
- Peter M. Thouetscreenplay (uncredited)
- Edgar Wallacenovel "The Clue of the New Pin": in italian version (uncredited in italian version) (uncredited)
- Cristina Galbó(as Christine Galbo)
- Antonio Casale(as Antony Vernon)
- Emilia Wolkowicz(as Emilia Wolkowich)
Rest of cast listed alphabetically
- John Gayford(uncredited)
- Alfonso Giganti(uncredited)
- George Hancock(uncredited)
- Charles Howerton(English version) (voice) (uncredited)
- Maria Michi(uncredited)
- Neil Robinson(uncredited)
- Alfred Vohrer(archive footage) (German version) (voice) (uncredited)
- Joe Wadham(uncredited)
- Fulvio Lucisanoproducer
- Leo Pescaroloproducer (as Leonardo Pescarolo)
- Horst Wendlandtproducer (uncredited)
- Joe D'Amatodirector of photography (as Aristide Massaccesi)
- Clarissa Ambacheditor (uncredited)
- Dante Tranimakeup artist
- Enrico Melonariproduction manager
- Giuliano Principatounit manager
- Wolfgang Fritscheproduction manager (uncredited)
- Luigi Urbaniassistant art director
- Francesco Verniersound (as Francesco Venier)
- Peter Ruddissound (uncredited)
- Luigi Ciccaresecamera operator
- Sesto Salinokey grip
- Enzo Zocchigaffer
- Giuliano Corsoassistant editor
- Bruno Nicolaimusical director
- Edda Dell'Orsosoloist (uncredited)
- Neil Robinsondialogue coach (uncredited)
- Luciano Vittorifilm processing (uncredited)
- Carlo Alighierovoice dubbing: Giancarlo Badessi (uncredited)
- Cesare Barbettivoice dubbing: Fabio Testi (uncredited)
- Fiorella Bettivoice dubbing: Karin Baal (uncredited)
- Thomas Dannebergvoice dubbing (german version) (uncredited)
- Vittoria Febbivoice dubbing: Cristina Galbó (uncredited)
- John Gayfordvoice dubbing (english version) (uncredited)
- Nando Gazzolovoice dubbing: Günther Stoll (uncredited)
- Ursula Herwigvoice dubbing (uncredited)
Crew believed to be complete
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