Just watched Dr. Who: Planet of Evil. It was really good. Great sets, FX and fantastic, over the top, acting. The plot was a little nebulous and what should been the most tense part was replaced by the line "I had a chat with it". All in all, solid fun.
So far, my rankings for Tom Baker are:
1. Ark in Space
2. Revenge of the Cybermen
3. Genesis of the Daleks
4. Planet of Evil
5. Terror of the Zygons
6. Sontaran Experiment
7. Robot