Tom and Jerry

Tom and Jerry was a cartoon on Earth.

Toshiko Sato told Ianto Jones that she had worked with mice long enough to know that their love of cheese was a cliché born out of old Tom and Jerry cartoons. (PROSE: Slow Decay)

Behind the scenes
Frank Welker provided the vocal effects for both characters in various pieces of media.

Information from invalid sources
After the Doctor regenerated into his seventh incarnation, both he and Peri Brown decided to look into the TARDIS scanner on where they landed, but one of the channels was stuck with a Tom and Jerry cartoon, featuring a cat and a mouse. (NOTVALID: Untitled)