The arrival in a small mountain town of a dissheveled stranger launches a series of murders committed by some sort of animal. As the town doctor and his daughter attempt to help the stranger, the sheriff investigates the murders; and they uncover a sinister experiment involving two rogue scientists, a car accident victim, his wife and children, and a serum that causes a man to turn into a ravaging werewolf.
Steven Ritch
as Duncan Marsh
Don Megowan
as Sheriff Jack Haines
Joyce Holden
as Amy Standish
Ken Christy
as Dr. Jonas Gilcrist
George Lynn
as Dr. Morgan Chambers
S. John Launer
as Dr. Emery Forrest
Harry Lauter
as Deputy Ben Clovey
Eleanore Tanin
as Mrs. Helen Marsh
Kim Charney
as Chris Marsh
Don C. Harvey
as Deputy (uncredited)
Larry J. Blake
as Hank Durgis
George Cisar
as Hoxie
