Doctor Who Companion Profile: Adric
Adric is a child genius, with a focus in math, from the 32nd century. Though he looks outwardly human, he’s actually Alzarian, or from Alzarius, a planet in E-Space (a parallel dimension). After working with the Doctor and Romana to help the Alzarians take to the stars, Adric stows away aboard the TARDIS and joins them on their adventures.