A decent "mad scientist" film. Boris Karloff is Dr Laurience who has found a way to transfer the thoughts of a living brain into another. Dr Wyatt (Anna Lee) has been summoned to Laurience's remote home which he shares with a crippled assistant Clayton (Donald Calthorp). He demonstrates his ability to transfer brain content from one brain to another.
Laurience impresses a rich patron Lord Haslewood (Frank Cellier) and moves to a state-of-the-art laboratory. Naturally Laurience begins to use his science for nefarious purposes. Firstly he swaps the brains of Haslewood and Clayton. Then he transfers his brain to the body of Lord Haslewood's son Dick (John Loder) to try and get Dr Wyatt into the sack...
Not a bad film though at times it seems to not be sure what kind of film it is supposed to be. Sometimes it is an enjoyable and sinister science-fiction horror but at others it is rather marred by average humour though the scene where Clayton (now as Lord Haslewood) wings it in a board meeting is great.