Doctor, Doctor is on YouTube. Grab the files while you can, I have no idea how easy this is to find on the trading forum.

1990 Promo
https://www.youtube.com/watch?v=jD7fb4rrggo

Season 3, episode 06 clip
https://www.youtube.com/watch?v=oRz1M873Rtk

Season 3, episode 11
https://www.youtube.com/watch?v=xiWIO8fjuCM

Season 1, episode 01
https://www.youtube.com/watch?v=oRz1M873Rtk