Doctor Who Season 2
TMDB
season number: 2
number of episodes: 39
IMDb: tt0562867
overview
Milestones this season included not one but two encore appearances by the Daleks; the departure of the original three companions, Susan Foreman, Barbara Wright and Ian Chesterton; and the first appearance of someone else from the Doctor and Susan's home planet, and the first Time Lord enemy to appear.