| Original title | The Octagon | 
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| Danish title | Mænd uden nåde | 
| Leikstjórn | Eric Karson | 
| Screenplay | Leigh Chapman | 
| Based on | Efter en story af Paul Aaron & Leigh Chapman | 
| Producer | Joel Freeman | 
| Director of Photography | Michel Hugo, Gabriel Torres | 
| Editor | Dann Cahn | 
| Composer | Dick Halligan | 
| Production designer | James L. Schoppe | 
| Appearance | Chuck Norris, Karen Carlson, Lee van Cleef | 
| Land | USA | 
| Domestic distribution | Saga Film | 
| Technical info | 35 mm, Farve, Tone | 
| Danish theatrical release | 14.08.1981 | 
| Cinemas | Saga | 
      Companies | 
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| Production company | American Cinema Production | 
| Domestic distribution | Saga Film | 
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      Instruktion | 
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| Instruktion | Eric Karson | 
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      Manus | 
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| Manus | Leigh Chapman | 
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      Produktion | 
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| Producer | Joel Freeman | 
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      Foto | 
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| Foto | Michel Hugo | 
| Foto | Gabriel Torres | 
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      Klip | 
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| Klip | Dann Cahn | 
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      Musik | 
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| Musik | Dick Halligan | 
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      Produktionsdesign | 
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| Produktionsdesign | James L. Schoppe | 
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      Medvirkende | 
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| Medvirkende | Chuck Norris | 
| Medvirkende | Karen Carlson | 
| Medvirkende | Lee van Cleef | 
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