WriterCarlton E. Morse, Charles ONeal Release date4 July 1946 (US) Based onradio play Faith, Hope and Charity Sisters by Malcolm Stuart Boylan and Julian Harmon CastKaren Morley (Rachel Martin), Jim Bannon (Jack Packard), Jeff Donnell (Nina Arnold), Mark Roberts (Reed Cawthorne (as Robert Scott)), Robert Wilcox (Richard Arnold), Barton Yarborough (Doc Long) Similar moviesI Love a Mystery, The Devil's Mask, The Man in Black, Dick Barton: Special Agent, Myrt And Marge, The Shadow
TaglineWill Tonight Bring Her...LOVE or DEATH?
The Unknown is a 1946 mystery film directed by Henry Levin made by Columbia Pictures as the third and final part of its I Love a Mystery series based on the popular radio program. The previous films were I Love a Mystery (1945) and The Devil's Mask (1946).
Relatives arrive for the reading of a will at a creepy mansion. Is someone is trying to murder Nina Arnold (Jeff Donnell) to claim a share of her grandmother's legacy, her grandmother who she never met? Could that someone be her emotionally unstable mother Rachel Martin (Karen Morley), from who she was taken when she was a baby? Investigators Jack Packard (Jim Bannon) and Doc Long (Barton Yarborough) are put on the case.
Rachel Martin Arnold - Karen Morley
Jack Packard - Jim Bannon
Nina Arnold - Jeff Donnell
Reed Cawthorne - Mark Roberts
Richard Arnold - Robert Wilcox
Doc Long - Barton Yarborough
Edward Martin - James Bell
Ralph Martin - Wilton Graff
Phoebe Martin - Helen Freeman
Joshua - J. Louis Johnson
TV Guide gave the film two out of five stars, describing the film as "filled with all the things that are guaranteed to make audiences jump out of their seats, such as hidden passageways, a hooded grave robber, eerie shadows, and mysterious killings."