Donovan's Brain is an independently made 1953 American black-and-white science fiction horror film, produced by Tom Gries for Allan Dowling Productions, directed by Felix Feist, that stars Lew Ayres, Gene Evans, Nancy Davis and Steve Brodie.

In the meantime, news photographer Yocum discovers that Cory has illegally stolen Donovan's brain and demands money to keep the secret.

Donovan's brain grows increasingly powerful, using Cory to collect a financial fortune and taking control of Yocum's mind and forcing him into a fatal car crash.

Ultimately, lightning strikes the Cory home and a fire breaks out, burning Donovan's brain and bringing an end to the horror.

Frank survives, and Cory willingly goes to accept the consequences for his actions, while Janice reminds the authorities that it was Patrick's idea, in a moment of freedom from Donovan's brain, to connect the ranch's lightning rod to the power supply, which resulted in the fire.