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.

• Clover Productions
• Richard Denning
• S. John Launer
• Michael Granger
• Gregory Gaye
• Angela Stevens
• Linda Bennett
• Charles Evans
• Tristram Coffin