Mitucus Minor

 was an ice planet which contained many large cliff faces.

In 3472, the planet was visited by the Doctor. (WC: TARDIS Cam No.4)

Behind the scenes

 * The name of the planet is not given within TARDIS Cam No.4, and is instead only mentioned on the official Doctor Who website.
 * Concept art for TARDIS Cam No.4 depicted the planet as being inhabited by a large, rat-like creature known as a "Squozzle", who lives within the planet's caves. In the final short, this creature remains unseen.