Mysterious Intruder is a 1946 American mystery film noir based on the radio drama The Whistler. Directed by William Castle, the production features Richard Dix, Barton MacLane and Nina Vale. It is the fifth of Columbia Pictures' eight "Whistler" films produced in the 1940s, the first seven starring Dix.Synopsis
Edward Stillwell, the aged proprietor of a music store, hires private detective Don Gale (Dix) to find Elora Lund, a then 14-year-old who vanished seven years ago at the time her mother died. Stillwell can only pay $100, but hints mysteriously that finding Lund could make Gale a rich man.
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