Villain(s)  Alien robot

Actor(s):  George Nader, Claudia Barrett, George Barrows, John Mylong

Brief Description  Robot Monster (1953) is an independent, low-budget American science-fiction film famously regarded by critics and cinephiles as one of the worst movies ever made, yet widely celebrated as a beloved B-movie cult classic. Directed and produced by Phil Tucker on a micro-budget of roughly $16,000, the film was shot in 3D and is universally recognized for its main antagonist, Ro-Man: an alien conqueror portrayed by an actor wearing a cheap gorilla suit and a deep-sea diving helmet.

Plot:
The story kicks off with a young boy named Johnny playing astronaut in Bronson Canyon. After falling asleep, he experiences a vivid nightmare that forms the bulk of the film. In this dream, an alien entity named Ro-Man Extension XJ-2 has successfully used a death ray ("Calcinator") to annihilate nearly the entire human race. Only eight humans survive, protected by an experimental antibiotic serum and an electronic radar-blocking fence built by a brilliant professor. Ro-Man spends the movie communicating with his supreme leader, the Great Guidance, via a shortwave radio setup in his cave.

The plot thickens when Ro-Man encounters the professor’s beautiful eldest daughter, Alice. He is suddenly overcome by human emotions and desire, leading to a hilarious existential crisis. He refuses to kill her, uttering the famous line: "I must, yet I cannot! How can I be an extension of the Great Guidance and be trapped in the web of these primitives?" Furious at this insubordination, the Great Guidance travels to Earth himself to finish the job. Just as the aliens unleash total cosmic destruction, Johnny wakes up from his nap, realizing it was all an intense dream—only for Ro-Man to suddenly flash on screen in the final frames.

Shot over four days for an estimated $16,000, it went on to gross an impressive $1 million at the box office. Filmmaker Phil Tucker could not afford a robotic costume. He hired actor George Barrows, who owned his own gorilla suit, and topped it with a space-age diving helmet. To make Ro-Man's cave look high-tech, Tucker utilized an ordinary "Automatic Billion Bubble Machine". Despite the minuscule budget, the film features an early orchestral score composed by Elmer Bernstein, who later scored cinematic masterpieces like The Magnificent Seven and To Kill a Mockingbird.