- Ennio De Conciniscreenplay &
- Hugh Fleetwoodscreenplay &
- Roberto Faenzascreenplay
- Hugh Fleetwoodnovel "The Order of Death"
- A.L. Sheppard(as Al Sheppard)
Rest of cast listed alphabetically
- Roberto Cicuttoassociate producer
- Elda Ferriproducer
- Giuseppe Pinoridirector of photography
- Adalgisa Favellahairdresser
- Franco Fredamakeup artist
- Giancarlo Marinhairdresser
- Fabrizio Sforzamakeup artist
- Michele Capozziunit manager
- Mario Di Biaseproduction manager (as Mario De Biase)
- Gil Rosselliniunit manager
- Isabelle Kramerassistant director (as Isabel Cramer)
- Gil Rosselliniassistant director
- Nicola Bucciproperty master
- Angelo D'Offiziproperty master
- Dante Lazzariproperty master
- Mario Rabadiset dresser
- Antonia Rubeoassistant art director
- Fausto Ancillaisound mixer
- Michael Billingsleysupervising sound editor (as Mike Billingsley)
- Stuart Deutschboom operator
- Edmondo Gintilifoley recordist / sound effects editor
- Rolf Pardulasound recordist
- Alessandro Peticcasound editor (as Sandro Peticca)
- Enrico Appetitostill photographer
- Carlo Carnevalistill photographer
- Ettore Corsoassistant camera
- Gianni Maddalenicamera operator
- Mario Montikey grip
- Enrico Sassocamera operator
- Emanuela Lucidisecond assistant editor
- Fiorenza Mullerassistant editor
- Giovanna Rittersecond assistant editor
- Luciano Vittoricolor consultant
- Bruce Eagerlocation manager: USA
- Enrico DeMelismusic producer (uncredited)
- Sergio Marcotullimusic engineer (uncredited) / music mixer (uncredited)
- Ennio Morriconeconductor (uncredited) / orchestrator (uncredited)
- Cristina Bayscript supervisor
- Serena Canevariscript supervisor
- Filipo Gizzicontinuity administrator
- Nicole Henryscript supervisor
- Floriana Campanozziproduction assistant
- Robert F. Colesberryproduction coordinator (as Bob Colesberry)
- Giammaria Vismaraproduction coordinator (as Gianmaria Vismara)
- Renzo Canestrarispecial thanks
- Stephen Caracappathanks: technical consultant to Mr. Keitel
- Elliot Grossthanks: chief of medical examiner of New York (as Dr. Elliot Gross)
- Nancy Littlefieldthanks: Mayor Office of New York City [New York Film Commission]
- Jessie Patermanthanks: New York City Police Department (as Lieutenant Jessie Paterman)
- Beverly Sammartinothanks: Mayor Office of New York City [New York Film Commission]
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