Shelly (The Playthings of Fo)

Following the First Doctor's emergency evacuation of the Council of Earth and Mars mission to Corbo,  was a companion of the First Doctor. He travelled alongside Dr Harroll Strong, and Strong's children, Jack and Dot, as well as Shelly and Hill.

He was a young, broad man with blond hair. (PROSE: The Playthings of Fo)

Behind the scenes

 * Though a member of the Earth-Mars mission to Corbo, is not actually introduced or mentioned until The Playthings of Fo.
 * Due to the way the other male companions in these two stories are referred to, Shelly is almost certainly this character's surname.