Earth in the 21st century got discovered by the ICI (Intergalaxtic committee of intelligence ) and declared it as the dumbest planet of all planets with life in the universe. The president of earth created a project called ‘SWEFS’ (german for Special Space Unit For Strange Star Systems) to shoot the dumbest people of earth onto other planets to increase Earth’s IQ average and to lower other planet’s ones. They kept the members of the SWEFS in believe that it is a serious mission to protect the space safety, so that they will never return to earth.
Due to calculation mistakes all ships landed on the most intelligent planet called NakNak. The NakNaks saw in the dumb passengers the smartest people on their planet, because they were retarded enough to do jobs they would never do. Dangerous jobs which no smart creature would do to risk his life. The NakNaks took the SWEFS concept over and support the crew in their retarded missions.