SpongeBob SquarePants

The Tenth Doctor mentioned SpongeBob SquarePants when Rose Tyler asked him if all stories were based on disappearing time traces. (PROSE: The Stone Rose)

Rory Williams refered to Francesco as a "big, stupid, great Spongebob." (TV: The Vampires of Venice)

Behind the scenes
David Arnold composed music for the series from 1999 to 2001.