Slip, Sach and the rest of the Bowery Boys enter a haunted house, where they engage in slapstick with a gorilla, a robot and a vampire

The fate of the planet in the hands of Larry, Moe and Curly Joe? That's exactly the situation the trio finds themselves in when they befriend a wacky scientist and must defend his secret invention from a pair of malevolent Martians. Sight gags, slapstick and plenty of nyuks abound as the Stooges bumble their way through an adventure of intergalactic proportions.

An aborted mission strands a crew on Venus where they find the planet inhabited only by women led by their evil Queen Yllana. Yllana had all the men of Venus killed, now that's she met Earth men, she wants them dead, too.

A fungus dubbed "Blood Rust" from outer space threatens to destroy the Earth.

Three druggists travel with a Milquetoast inventor, Schuyler, and his girlfriend, Diane, to ancient Greece on a newly invented time machine. There, the evil tyrant, Odius, takes a shine to the woman and has the guys enslaved as galley rowers using the excuse of the three druggists helping a rebel leader, Ulysses, escape. The rigors of the rowing pump Schuyler up into a muscleman with strength comparable to Hercules himself, who is in the employ of Odius. The threesome get the idea of raising money by promoting Schuyler as Hercules for a series of physical contests. Using a combination of his great strength and, a judicious use of a large supply of potent tranquilizers Curly-Joe brought with him, Schuyler is a success. However, this leads to trouble when the real McCoy learns about the imposter.

A young man steals a car and ends up involved in a pedestrian fatality. The only witness is a girl he has just met. He threatens her life if she talks, so when she refuses to tell what she knows, she is sent to reform school.