I second Danger UXB. You can see the opening on a VT71 in my very first YouTube video
http://youtu.be/vrbd95fuBTo
Survivors is also great. The original 1970s series - not the recent remake. It's about survivors of a global epidemic struggling to rebuild society.
http://www.imdb.com/title/tt0072572/
http://youtu.be/GH6us7DLaRk
There's also The Omega Factor from 1979 featuring Louise Jameson (Leela) from Dr Who.
http://www.imdb.com/title/tt0078665/
http://youtu.be/DARojQpyu9A