Donovan's Brain (1953)

A brilliant scientist revives the brain of a deceased individual using electrodes while it floats in a liquid-filled tank. As the brain awakens, it develops extraordinary psychic abilities, exerting a malevolent influence over the doctor who revived it. This unsettling transformation leads to a struggle for control, reminiscent of the classic "Jekyll and Hyde" dynamic, as the once-revered scientist grapples with the dark forces unleashed by his own creation. The tension escalates as the line between savior and monster blurs, resulting in a gripping tale of ambition and consequence.