TARDIS

A convention which took place on 2011 Earth was known as Chicago TARDIS 2011. The Inspector, then in his eleventh body, had never heard the word, and expressed surprise that the gathering, which he believed to be about himself, was called that. (TV: Inspector Spacetime Video Greeting)

In one parallel universe, an ill-mannered equivalent of the Inspector known as the Doctor traveled in a timeship called the RETARDIS. (WC: Toon Crash)