Companion (Worlds in Time)

A companion of the Eleventh Doctor travelled with him to countless worlds, including Earth, Ember, and Messaline.

The companion's gender and species varied, as various tellings indicated that they were either a human from 21st century Earth, a Silurian from Eocene era Earth, a Catkind from New Earth, or a Tree of Cheem from Cheem.

They encountered many species, including Autons, Clockwork Droids, and Zygons. (NOTVALID: Worlds in Time)

Behind the scenes

 * In the video game Doctor Who: Worlds in Time, the player could choose his character's gender, name, and race. The supplied races were human, Catkind, Silurian, and Tree of Cheem. Which race they chose would define their "home world" and thus which level they started the game on.