Black Friday

A bookish college professor whose life is upended when part of gangster Red Cannon's brain is implanted into him. He experiences irritability and memory gaps as the Cannon persona surfaces, blurring the line between professor and killer. He grapples to maintain normalcy while the cannibalized memories threaten his humanity.

A scientist who performs the controversial brain transplant and engineers, through hypnosis, the partial awakening of Cannon within Kingsley's body. He pursues the gangster's hidden fortune in New York as a testbed for a breakthrough he believes will revolutionize life extension. His calculations are cold, but his motives reveal a belief in science as destiny.

Kingsley becomes a vessel for Cannon, alternating between a refined professor and a brutal gangland killer. Under hypnosis, his body serves as a disguise for murders while Cannon's memory lapses in the Kingsley persona. Ultimately, the Cannon identity is killed by Sovac in a shocking turn of events.

Cannon's lover who helps influence events and leaks information that leads to confrontations with the former gang. Her involvement intensifies the peril surrounding Cannon's memory and the stash he seeks. Her role ties romance to crime and danger within the plot.

Sovac's daughter, who recognizes Kingsley in his Cannon persona and pleads for him to return to normal life. Her concern for Kingsley adds an emotional counterpoint to the scientist's cold ambition. She helps push the moral choice of ending the experiment.