From my 'Behind the Scenes' book on Blake's 7, straight from the horse's mouth, as it were
The only change between series one and two of Blake’s 7 was the replacement of the actor playing Travis. Stephen Greif had left to pursue other roles, and Brian Croucher stepped in to play the part. “I originally went to see David Maloney for the role of Blake. I through with my background, I would have made a wonderful intergalactic criminal, but it wasn’t to be. A year or two later, Blake’s 7 was going again, and Stephen had decided, for whatever reason, not to go into a second series as Travis. David Maloney had seen me in a series I had just completed called Out!, and offered me the part.”
Brian had a baptism of fire during the first episode with George Spenton-Foster, and deeply regretted that it had not been in the hands of another director. “I saw David recently, and said to him, ‘It would have been nice for you to have directed at least the first episode and got me into it, just help me,’ because if anyone knew what the first series was about and the second series was going to be, it was the producer. That would have been the thing to do, but unfortunately, I had George Spenton-Foster, and I don’t know how other people feel about him, but I had nothing in common with him at all.”
Jacqueline Pearce watched the situation develop in rehearsals. “I suspect it was chemical thing. It was difficult to see someone used as a whipping boy. It happened quite frequently, and I found it very disturbing. It was a great shame. Brian was taken on to play the same character as Stephen Greif, which was a bit silly, because if they were going to do that, then they should have got a heavy, which Brian isn’t. He’s a lightweight, so he had a lot of problems, and I don’t think George Spenton-Foster was particularly kind to him. I liked Brian very much, and he was fun to work with.”
“Essentially, there wasn’t a relationship,” says David Maloney’s assistant Judith Smith. “Brian was down-to-earth, very masculine and very talented actor, but miscast in this particular role. Along comes George Spenton-Foster, a dear man, but very much into sequins and feathers and the totally flamboyant side, which was why Jackie got on so well with him. He and Brian just clashed from the word ‘go’. George couldn’t see Brian’s good points, and Brian couldn’t see George’s. It was two total opposites, pure and simple. Fortunately, George didn’t direct too much, but he did Brian’s first one, which didn’t help Brian settle into the new role at all. There are bits where Brian comes through as being very good as Travis, but they were not directed by George Spenton-Foster. I’m sure David talked to both of them about it, but I remember that it was well known that these two clashed, and only had to see them at rehearsals to see that there was no communication between them at all; George was not directing Brian.”