Directed by
| Samuel Fuller | ||
| Rafael Portillo | ... | (uncredited) |
Writing Credits
| Samuel Fuller | ... | (screenplay) and |
| John T. Dugan | ... | (screenplay) (as John Kingsbridge) |
| Victor Canning | ... | (novel) |
| Ken Hughes | ... | (adaptation) (uncredited) |
Cast (in credits order) complete, awaiting verification
| Burt Reynolds | ... | Caine | |
| Arthur Kennedy | ... | Doc | |
| Barry Sullivan | ... | Prof. Dan Mallare | |
| Silvia Pinal | ... | Anna | |
| Francisco Reiguera | ... | Yusef (as Francisco Reyguera) | |
| Enrique Lucero | ... | Inspector Barok | |
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Manuel Alvarado | ... | Latalla |
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Carlos Barry | ... | Runt |
| Rest of cast listed alphabetically: | |||
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José Chávez | ... | Lieutenant (uncredited) |
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Cecilia Leger | ... | Elderly Woman (uncredited) |
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Jose Marco | ... | Pedro (uncredited) |
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Emilia Suart | ... | Asha (uncredited) |
Produced by
| José Luis Calderón | ... | produced in association with (as Jose Luis Calderon) |
| Mark Cooper | ... | producer |
| Skip Steloff | ... | producer |
Music by
| Rafael Moroyoqui | ||
Cinematography by
| Raúl Martínez Solares | ... | director of photography (as Raul Martinez Solares) |
Editing by
| Carlos Savage | ... | (uncredited) |
Art Direction by
| Manuel Fontanals | ... | (uncredited) |
Production Management
| Norman Baer | ... | in charge of production |
| Herbert L. Strock | ... | post-production supervisor |
Stunts
| Jose Marco | ... | stunts (uncredited) |
Camera and Electrical Department
| Said Karem | ... | director of photography: second unit, The Sudan |
Additional Crew
| Herbert L. Strock | ... | assistant to producers |
| Gioele Centanni | ... | distributed in italy (uncredited) |