Hammer's most underrated movie
The performances are excellent. Peter Cushing gives one of his best, and even the normally lacklustre Patrick Allen is perfectly suited to the part.
The direction (by the late Peter Graham Scott) is strong. The marsh scenes are full of atmosphere. It's suspenseful and taut.
The story is also very strong. It's well-paced, exciting, full of emotion, thrills, adventure. It's the only Hammer film that's ever brought me (very nearly) to tears.
It's well-written. The interplay between Blyss and Captain Collier is very witty.
All in all, this has about everything I'd want in a Hammer film. I also like that the story's moral is really clear and poignant, without being over-obvious or didactic.
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