Anthropologist Dr. Brockton unearths a primitive troglodyte -- an Ice Age "missing link": half-caveman, half-ape -- in a local cave. Through medical experimentation, she manages to communicate with him and domesticate him before he's let loose by an irate land developer and goes on a rampage, terrorizing the local citizenry.
Joan Crawford
as Dr. Brockton
Michael Gough
as Sam Murdock
Bernard Kay
as Inspector Greenham
Kim Braden
as Anne Brockton
David Griffin
as Malcolm Travers
John Hamill
as Cliff
Thorley Walters
as Magistrate
Jack May
as Dr. Selbourne
Geoffrey Case
as Bill
Robert Hutton
as Dr. Richard Warren
Simon Lack
as Colonel Vickers
David Warbeck
as Alan Davis
