Musty TV's Maniacal Movie Countdown - Day 23

This doesn't air until tomorrow morning at 6:00am on AMC, but that just gives you extra time to set those TiVos, because why would you ever want to miss seeing a movie called "The Brain Eaters"? Which is actually based on a book called "The Puppet Masters" by Robert Heinlein? (Which is a lot like "The Body Snatchers" by Jack Finney?) And features an unrecognizable Leonard Nimoy? And is only about an hour long?