Beginners Guide to Doctor Who in gifs
Adam Rifkin stashed this in Doctor Who
Stashed in: 1960s
I'm going to summarize the above links.
"Classic" Doctor Who started in the '60s and ended in 1989.
He always has a companion by his side to travel around the universe.
Or she falls in love with him.
Other times they're like brother and sister.
And then you have the Ponds (long story with strange dynamics).
But they all eventually leave, and everyone cries.
The Doctor also has Dr. River Song, with whom he's "friendly" (but we won't spoil that story).