| Original title | The walls of hell |
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| Danish title | Helvedes mure |
| Other titles | Intramuros |
| Leikstjórn | Gerardo De Leon, Eddie Romero |
| Screenplay | Cesar Amigo, Ferde Grofé Jr., Eddie Romero |
| Director of Photography | Felipe Sacdalan |
| Composer | Tito Arevalo |
| Appearance | Jock Mahoney, Fernando Poe Jr., Mike Parsons |
| Land | USA, Filippinerne |
| Domestic distribution | Simonex Film |
| Technical info | 35 mm, Normal, Sort-hvid, Tone |
| Danish theatrical release | 19.04.1965 |
| Kommentar | Censurnr. 81056 og 80895 |
| Danish rating | Forbudt for børn u. 16 år (1935-1969) |
Companies |
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| Production company | Hemisphere Pictures, Filippines Prod. Inc. |
| Domestic distribution | Simonex Film |
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Instruktion |
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| Instruktion | Gerardo De Leon |
| Instruktion | Eddie Romero |
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Manus |
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| Manus | Cesar Amigo |
| Manus | Ferde Grofé Jr. |
| Manus | Eddie Romero |
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Produktion |
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| Produktion | Eddie Romero |
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Foto |
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| Foto | Felipe Sacdalan |
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Musik |
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| Musik | Tito Arevalo |
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Medvirkende |
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| Medvirkende | Jock Mahoney |
| Medvirkende | Fernando Poe Jr. |
| Medvirkende | Mike Parsons |
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