When his brother disappears, Robert Manning pays a visit to the remote country house he was last heard from. While his host is outwardly welcoming - and his niece more demonstrably so - Manning detects a feeling of menace in the air with the legend of Lavinia Morley, Black Witch of Greymarsh, hanging over everything.
You can now watch Curse of the Crimson Altar online on the following streaming providers in the United States.
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| Writing | Henry Lincoln | Screenplay |
| Production | Tony Tenser | Executive Producer |
| Writing | Mervyn Haisman | Screenplay |
| Directing | Vernon Sewell | Director |
| Production | Louis M. Heyward | Producer |
| Writing | H.P. Lovecraft | Novel |
| Production | Gerry Levy | Associate Producer |
| Costume & Make-Up | Michael Southgate | Costume Design |
| Art | Derek Barrington | Art Direction |
| Writing | Jerry Sohl | Story |
| Camera | John Coquillon | Director of Photography |
| Editing | Howard Lanning | Editor |
| Sound | Peter Knight | Original Music Composer |
