Murders, with victims dying from spines broken by brute strength, erupt in the city and the killers, when encountered, walk away unharmed by police bullets which strike them. A police doctor's investigation of the deaths leads to the discovery of an army of dead criminal musclemen restored to life, remotely controlled by a vengeful former crime boss and a former Nazi scientist, from the latter's laboratory hidden in the suburbs.
Richard Denning
as Dr. Chet Walker
S. John Launer
as Capt. Dave Harris
Michael Granger
as Frank Buchanan
Gregory Gaye
as Dr. Wilhelm Steigg
Angela Stevens
as Joyce Walker
Linda Bennett
as Penny Walker
Charles Evans
as Chief Camden
Tris Coffin
as Dist. Atty. MacGraw
Pierre Watkin
as Mayor Bremer
Harry Lauter
as Reporter #1
Larry J. Blake
as Reporter #2
Paul Hoffman
as Tom Dunn (uncredited)
