The first few minutes of this film had me thinking maybe I was about to see an unappreciated gem. The science actually made some sense, and the banter between the leads was fairly sharp and believable. This all changed a few minutes into the movie when the most likable character, the scientist's assistant, is unceremoniously killed. After that, the once-promising movie degenerates into the usual 50s sci-fi silliness, still amusing and worth seeing through, yet sadly lacking the promise of those first few shining minutes.

I will say it was heartwarming to see how quickly the girlfriend and her father accept the presence of the second, good alien brain. They would be ideal emissaries to alien worlds in view of their great flexibility of mind. The desert settings used in this film are also attractive. Finally, I must hand it to the U.S. military for being so quick to deduce that an alien invasion of some sort was taking place.

Now this is the ultimate in 50s low budget drive-in outer space silliness. A rogue Brain from planet Arous comes to Earth to overtake body of an good boy atomic scientist and (surprisingly) conquer the Earth! Later, second Brain arrives to stop him, overtaking the body of poor doggie. Special effects look like the ones from Attack of the 50ft Woman (see-through monsters etc.) and the plot is similarly goofy. John Agar´s performance as an atomic scientist turned fiend is overacted as ever, which but adds to whole goofiness of the film. Recommended to any 50s B-movie fan.