Scientists assembled to prove their methods are effective in criminal investigation try to solve a series of murders.
Bruce Bennett
as Patrick Norris
Florence Rice
as Lola Hobbs
Barton MacLane
as Sam O'Donnell
Joe Downing
as Lou Boyd
Joseph Crehan
as Police Chief Hobbs
Howard Hickman
as Dr. Talbot
Edward Van Sloan
as Prof. Holtz
P.J. Kelly
as Prof. Cordet
Don Beddoe
as Maj. Blaine
William Forrest
as Mr. Brooks
Dantón Ferrero
as Mr. DeSoto
George Anderson
as Detective Bennett
