Moe Howard, Larry Fine and Joe DeRita are three janitors at a spaceport who get into all kinds of trouble when they accidentally take off in a rocket and head for Venus.
As usual there are many sight gags especially involving gravity while in flight. When they boys land on Venus they encounter a huge fire breathing tarantula, and a talking Unicorn.
The Unicorn leads them to a city inhabited by an evil computer who creates evil replicas of the three. When they finally escape and head back to Earth they are hailed as heroes.
This is very light fare, and it should be. There are plenty of laughs and the Stooges are joined in the cast by Robert Colbert, Jerome Cowan and the very sexy Anna-Lisa.
I would recommend this for any Stooges fan, and yes it makes good, easy going Halloween viewing.