| Original title | I saw what you did |
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| Danish title | Morderen tager telefonen |
| Leikstjórn | William Castle |
| Screenplay | William McGivern |
| Based on | Efter en roman af Ursula Curtiss. |
| Director of Photography | Joseph Biroc |
| Editor | Edwin H. Bryant |
| Composer | Van Alexander |
| Appearance | Joan Crawford, John Ireland, Leif Erickson |
| Land | USA |
| Domestic distribution | ASA |
| Technical info | 35 mm, Normal, Sort-hvid, Tone |
| Danish theatrical release | 16.05.1966 |
| Cinemas | Colosseum |
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| Production company | Universal Studios |
| Domestic distribution | ASA |
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Instruktion |
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| Instruktion | William Castle |
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Manus |
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| Manus | William McGivern |
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Produktion |
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| Produktion | William Castle |
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Foto |
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| Foto | Joseph Biroc |
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Klip |
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| Klip | Edwin H. Bryant |
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Musik |
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| Musik | Van Alexander |
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Medvirkende |
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| Medvirkende | Joan Crawford |
| Medvirkende | John Ireland |
| Medvirkende | Leif Erickson |
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