The first Space Mouse was a comic book character published from 1953 to around 1956 by Avon Publications. Space Mouse was also the name of a 1959 Universal Studios cartoon featuring two mice and a cat named Hickory, Dickory, and Doc. A second Space Mouse character was published by Dell Comics (and later by Gold Key Comics) from 1960 to around 1965. The Dell Comics version was also featured in a 1960 cartoon produced by Walter Lantz, entitled The Secret Weapon.