Mouse

A mouse was a species of mammal native to Earth and possibly other parts of the universe.

In 1879, Rose-the-Cat piloted the TARDIS to Paris, France, where she found a mouse. (COMIC: A Rose by Any Other Name)

When the Tenth Doctor landed in Paws 'N' Claws, they defeated Cybermen. However when he and Rose went to defeat the Cybermice (converted mice), a mouse which looked like the Tenth Doctor was already stopping them. (COMIC: Untitled)

On Gallifrey, a mouse was enlarged by during an experiment. The giant-sized mouse ate the Lord President's pet cat and bit the President himself, which resulted in the Rani's expulsion from Gallifrey. (TV: The Mark of the Rani)

Professor George Litefoot had pet mice as a child. (AUDIO: Encore of the Scorchies)

In the year 4000, Froyn and Rhynmal intended to test their new long-range teleportation system by sending two lab mice to Mira. These were later exterminated by Daleks. (TV: The Daleks’ Master Plan)

The Fourth Doctor called Leela "mouse" after she inhaled helium and it temporarily changed her voice. (TV: The Robots of Death)

On Skaro, Romana II hinted that a determined mouse could move over a barrier the Fourth Doctor was putting on the way of the Daleks. (TV: Destiny of the Daleks)

The Fourth (TV: The Talons of Weng-Chiang) and Tenth Doctors (TV: The Doctor's Daughter) occasionally carried a toy mouse, which he used to distract people.

The Ninth Doctor claimed that there was a planet which had talking mice. (PROSE: Winner Takes All)

In Prague, used the time winds to bring a dead mouse back to life and accelerate its evolution by millions of years into a humanoid form, which he planned to use as a new host body for himself, but the Seventh Doctor defeated the Master's plan. (PROSE: Omegamorphosis)

Behind the scenes

 * Jon Pertwee acquired a field mouse as a temporary pet during a break in the location filming for The Mutants at Stone House Farm in Frindsbury, Kent. He named the mouse Solos, after the planet featured in the story.