

A dead man's brain in a hidden laboratory told him to KILL... KILL... KILL
A scientist takes the brain of dead man and revives it via electrodes as it lays suspended in a tank of liquid. Soon, the brain grows to possess enormous psychic powers and inflicts its personality upon the doctor who saved it, creating a "Jekyll and Hyde" paradigm.
Felix E. Feist
Chief Tuttle

Victor Sutherland
Nathaniel Fuller

Michael Colgan
Tom Donovan

Peter Adams
Mr. Webster
Harlan Warde
Treasury Agent Brooke

Shimen Ruskin
Tailor