The Stooges meet slightly eccentric Professor A.K. Rimple and his daughter as well. They ask the stooges to help them with a space mission. The mission makes the group land on the planet Sunev, which is Venus backwards. When they land on there, they are taken with three attractive female aliens. At first, sparks fly literally, when the girls kiss the boys. But then the ladies turn cannibalistic, and are about the suck the Stooges' blood. The boys jump back in the rocket ship, knocking the Professor and his daughter out cold as a result, and work their way back to Earth. They are then shown relating the story of their adventure to an assembled group. When they finish, the "Liars Club" presents them with the award for being the biggest liars in the world.
- Moe Howard as Moe
- Larry Fine as Larry
- Joe Besser as Joe
- Benny Rubin as Professor A.K Rimple
- Doreen Woodbury as Lisa Rimple
- Emil Sitka as Liars Club MC
- Lorraine Crawford as Fauna
- Marilyn Hanold as Flora
- Harriette Tarler as 3rd Amazon
- Third stooge, Joe Besser (49 years old) suffered a mild heart attack shortly after filming began.
- Space Ship Sappy featured a more "Gentlemanly" haircut between Moe and Larry.