Originally Posted by kitkat1971:
“. He was also petty enough to punish innocents for being in the wrong place at the wrong time - for instance, not giving Louise Jameson a chance simply because she was the new companion when he hadn't wanted a companion. ”
I don't know if it was really as simple as that. For sure, he maybe didn't show as much consideration and kindness to most people as he should have, no argument, but I don't think it was just because he didn't want a companion. He liked Liz Sladen and resented working with someone else. On top of that he found Louise Jameson boring and precious. Again, I'm not saying he shouldn't have tried harder to be civil to her, but there was a personality clash there - it wasn't just arbitrary. Louise Jameson expected respect as his colleague and Tom is the kind of person you have the earn the respect of. And Louise did as time went on.
Not everyone likes everyone. I think Tom just didn't like her, plain and simple, and it was probably mutual. Of course, they need to deal with that professionally and I'm sure Tom didn't.
As I said above though, it's all water under the bridge now. By both accounts they get on great now when they work together with Big Finish.
I also want to add that as unpleasant, even upsetting it could be to someone personally involved, as someone on the outside, I can't help but admire the devil in Tom of that period sometimes. I bet there were a lot of people in the cast and crew who wanted to talk to snotty little Matthew Waterhouse the way Tom did. It does amuse me on DVD commentaries when he refers to Matthew Waterhouse the actor (not the character) as 'Adric' or calls him 'that little boy' (again, Waterhouse, not Adric)

Let's not forget it's these socially untypical or untactful personality traits that contributes to his charisma, and consequently his work. If Tom was a diplomatic, considerate person he wouldn't be Tom Baker the personality that we all enjoy so much.