6 Pinewood Derby

Randy steals a superconducting magnet and slips it into the back of Stan's pinewood derby car to ensure his son will win the annual state derby. Stan's car takes first place while reaching warp speed and shooting off into space, where it is discovered by an alien species. A spaceship soon lands in South Park. The pilot, an alien bank robber, demands that Stan and Randy build a new warp drive, but Randy refuses to tell the truth in order to avoid admitting he cheated in the derby. The bank robber is killed, and Randy convinces Earth's leaders to keep the alien's "space cash", which they divide among themselves. An Intergalactic Police ship arrives looking for the robber, but no one admits to seeing him or the money. Eventually, however, Stan admits he cheated in the pinewood derby and returns the trophy. The robber emerges from the officers' ship, revealing he faked his own death and is really the ambassador to new worlds. The people of Earth were being tested to determine whether they were worthy to join the intergalactic community. Having failed, the Earth is forever isolated from the rest of the universe as punishment.