Castrovalva
After the dramatic demise of the fourth doctor at the Pharos project on earth, there was much speculation on what his replacement would be like and an agonisingly long time in which to do so. Not since the recent abrupt ending of Blake's 7 had a tv show been so exciting. Castrovalva came along, finally, and it exceeded all my expectations by being so wonderfully different from any other dw show I'd previously seen.
The fourth doctor had been a part of my life for so long that he had seemed virtually indestructible. For seven long years it had been jelly babies, scarves and toothy grins, and we still weren't tired of it! But Peter Davison was everything the fourth doctor was not - polite, uncertain about things, generally befuddled, his voice tended to go a bit high when stressed out and I think he used to wag a finger at recalcitrant monsters. In short, a complete change of character and a welcome one. The 1980's were just starting, so why not start them with a new doctor utterly unlike the old one? Splendid! The programme was on a completely new track and I for one was captivated.
The Master came across brilliantly as well in this story, even with Anthony Ainley playing him. He wasn't for once into taking over the universe, there wasn't a doomsday machine or a Chronovore waiting on Castrovalva for him; he purely and simply wanted to destroy the Doctor. Nothing else. It was a marvellous idea, focusing his character on revenge and nothing more. And from Terror of the Autons onwards, the Master had a lot to feel vengeful about.
I loved the simple setting of the town, the cast, the forest scenes, the fact that almost half this story actually takes place within the Tardis itself (another innovative idea not used for some considerable time) and no, at the time I had no idea of the Portreve's real identity. I know it looks bloody obvious now, seeing the thing on video again. So this, the first fifth Doctor story, became my favourite one for a long time, even beating Earthshock as it was so groundbreaking. Brilliant!