The Baron of Terror; American release title: The Brainiac) is a 1962 Mexican supernatural horror film directed by Chano Urueta, written by Federico Curiel, Adolfo López Portillo and Antonio Orellana, and starring its producer, Abel Salazar.

As this sentence is carried out, the Baron promises that he will return with the next passage of a comet (visible over the scene of the execution), and slay the descendants of his accusers.

Thus in Mexico City in 1961, the promised comet returns, carrying with it Baron Vitelius, who takes advantage of his considerable abilities as a sorcerer to carry out his threat: he is able to change at will into the hairy monster of the title in order to suck out the brains of his victims with a long forked tongue; furthermore, he has strong hypnotic capabilities and is able to render his enemies motionless or force them to act against their wills.

[4] Kevin Nickelson from Classic Horror.com gave the film a positive review, writing "The Brainiac deserves some credit for having a good idea to begin with.

[6] The Terror Trap called the film "hilarious fun thanks to its shameless ability to discard logic behind its pseudo sci fi plot.