"The Unknown" was the final entry in Columbia’s I Love A Mystery series. A woman hires two detectives to keep her alive long enough to claim her inheritance.
Karen 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
James Bell
Edward Martin
Wilton Graff
Ralph Martin
