Before the invasion of the satellite channels, Doordarshan or 'DD' was the lone network for the Indian viewers. Then in 1991, Manmohan Singh presented a budget and cable channels came to India and everybody forgot Doordarshan conveniently.
Today I came across some old Doordarshan clips and those brought back some fond memories of the good old Doordarshan days. I have quite a few nostalgic memories, since I grew up with those.
I have tried to compile a list of some of the popular series back then.
Action: Street Hawk, Knight Rider
Children (animated): He-Man, Spider-Man, Talespin, Duck Tales, The Jungle Book
Children (non-animated): Giant Robot (Johnny Sokko And His Flying Robot), Vikram Aur Betaal. Charlie Chaplin, Laurel & Hardy, Fairy Tale Theatre
Comedy: Mr. Yogi, Dieter Hallervorden, Flop Show
Crime/Thriller: Karamchand, Herr Derrick (Old Fox), Byomkesh Bakshi
Cultural: Surabhi
Drama: Oshin, Nukkad, Neev
Fantasy: Singhasan Battisi
General: Malgudi Days
Historical: Bharat Ek Khoj, Chanakya
Mythological: Ramayana, Mahabharat
News: The World This Week
Sci-Fi: Star Trek
Feel free to add and/or discuss...

PS: I'll add more info on each of these later.