During a reconnaissance mission to Earth, Morty and the Captain arrived in New York City just outside the Firehouse. They mistook Slimer for a standard Earthling and kidnapped him. Slimer was taken to Pluto to serve in a series of tests he thought were just games. Slimer enjoyed each test causing the Captain to overload all the testing equipment. Eventually, their compound was destroyed and they dumped Slimer back in New York City.