In an alternate reality, Captain Thomas Tomorrow was a space officer for the Imperial Planets Science Police. In this reality, Captain Tomorrow commanded a cruiser starship leading a fleet of Imperial vessel in an invasion of Durla. (TOS - Legion of Super-Heroes comic: "Issue 1")
- The time travel-distortion caused an "evil" variation of reality that was similar in respects to Star Trek's mirror universe, but with elements of DC Comics characters. In particular, Tommy Tomorrow was, in DC's primary reality, a classic science fiction hero from the 1940s. In his unaltered history, he is an orphan who is adopted by a General Horatio Tomorrow of a space exploration organization named the Planeteers. Various versions of DC's comics depict this occurring in either the 21st or 22nd century. In another post-apocalyptic reality of DC's comics, Tommy Tomorrow is instead known as Kamandi, the Last Boy on Earth.