The Five Companions - featuring a multi-companion crossover - is available for free in honor of Doctor Who Day.

First Doctor: William Hartnell (November 1963 – October 1966) Crotchety, eccentric, not always truthful with his companions, came to care deeply for them. Set the pattern for later companions. “There ...

The Doctor has encountered many faces during his travels, and sometimes, he encounters them more than once.