"A small-town reporter investigates a mysterious group holed up in a country lodge."
Carla Balenda
as Janet Keller
Elliott Reid
as Matt Corbin
Edgar Barrier
as Dr. Edward Keller
Raymond Burr
as Steve Loomis
Otto Waldis
as Dr. Wilhelm Bucholtz
Michael Steele
as Chick
Lurene Tuttle
as Molly Loomis
Peter Brocco
as Nate Garr
Lewis Martin
as Peterson
Frank Darien
as Luther Adams
Olive Carey
as Mabel Turner
George Barrows
as Federal Agent (uncredited)
Stanley Blystone
as Guard on Pier (uncredited)
Eddie Borden
as Medical Experiment Patient (uncredited)
George Bruggeman
William Challee
as Guard (uncredited)
George Chandler
as Jed (uncredited)
G. Pat Collins
as Nelson - Gate Guard (uncredited)
Tom Daly
as Germ Experiment Victim (uncredited)
Don Dillaway
as FBI Agent McIntyre (uncredited)
Art Dupuis
as Speedboat Pilot (uncredited)
Douglas Evans
as Carstairs (uncredited)
Elizabeth Flournoy
as Secretary (uncredited)
Robert Foulk
Gregory Gaye
as Sweitart (uncredited)
Milton Kibbee
as Produce Company Proprietor (uncredited)
Mathew McCue
Lee Miller
Billy Nelson
as Ed (uncredited)
Jamesson Shade
as Sheriff (uncredited)
Brick Sullivan
Bob Thom
Frank Wilcox
as Bradford (uncredited)
William Yetter Sr.
as German Pier Guard (uncredited)
William Cameron Menzies
Director
Paul Sawtell
Original Music Composer
George Bricker
Screenplay
Robert Golden
Editor
Lewis J. Rachmil
Producer
Roy Hamilton
Story
Nicholas Musuraca
Director of Photography
Frank L. Moss
