The Monthly Film Bulletin wrote: "This virtuoso study in suspense only serves to show how remarkable is Hitchcock's gift of clothing his own often absurd fantasies in the incidentals of reality which give them "a peculiar credibility. This film has no such gift. Michael Anderson's direction is often astonishingly clever in its tricky way; but the tour de force is too consistently maintained. There are no anticlimaxes to relieve and at the same time to point up the tension. Nor is the treatment of the characters subtle enough to sustain the sudden reversals of sympathy which the plot demands. Anne Baxter and Faith Brook are, to say the least, spirited; Richard Todd is plumply efficient."
Bosley Crowther in his review for
The New York Times considered the plot as overly complex and torturous but that the melodrama was "nothing amazing, and neither is this film. It's just a moderately well-done program picture, endowed with a couple of standard thrills".
Leonard Maltin awarded the film three out of four stars, calling it an "exciting, Hitchcock-like melodrama". In
British Sound Films David Quinlan calls the film a "suspensful hair-raising thriller".
Leslie Halliwell opined: "Tricksy, lightly controlled suspense melodrama with a perfectly fair surprise ending. Handling equivocal but competent."
The Radio Times Guide to Films gave the film 3/5 stars, writing: "Coming off the back of
The Dam Busters (1955),
1984 (1956) and
Around the World in 80 Days (1956), director Michael Anderson was destined for a disappointment, but it is to his credit that this ludicrously contrived thriller not only holds the attention, but also actually manages to induce a short intake of breath at the totally unexpected dénouement. Anne Baxter gives her one of her best performances as a recuperating neurotic who is convinced long-lost brother Richard Todd is after her diamonds." ==Remakes and adaptations==