Where Film Noir Lives...Too!
A mysterious artist, Ronnie Mason, steals a dead woman's wedding ring and money and leaves a fake suicide note. Her husband, Thomas Turner, believed his wife might have been seeing Mason behind his back.
Mason leaves town, changes his name to Marsh and rents a room in the house of Hilda Fenchurch and her younger sister Anne. To the consternation of professor Andrew Lang, who loves Hilda, she falls for Marsh, the new tenant.
The scheming Marsh learns that it is Anne who might inherit a of money, so he suddenly switches his affections toward her. Hilda is jealous and suspicious. She plots to lure Marsh to a beach house and poison him.
Bosley Crowther, the film critic for The New York Times, panned the film and wrote, "A woman scorned and a handsome cad whose romantic impulses fluctuate according to the size of a lovely lady's are apt to do the strangest things, especially in diluted little melodramas such as Danger Signal, ...Sometimes, too, scenarists let such plots get out of hand and wander perilously close to boredom, so close, in fact, that the director resorts to one of those screeching-tire automobile races against time—and death—in what is obviously a last desperate attempt to overcome narrative ."
Film critic Dennis Schwartz also was not complimentary, "This routine noir feature just doesn't cut it -- its story is too implausible and it lacks proper tension...The story simply didn't add up, but its quick pace helped move things along. Zachary Scott can always be counted on to give a competent performance. But nothing can save this film from mediocrity. It's a febrile attempt to study a psychopath."