Seasons 3 and 4 had Paul Darrow completely committing to Richard-III-in-space level of Serious Acting that would have killed the entire Star Trek cast at 50 paces (apart from Patrick Stewart).

That's what I like about Blake's 7. I was never a fan of goodies as a kid. Always preferred a bandit. All the characters were shifty. There weren't no goodies or baddies.

I've just realised that Paul Darrow was acting like he was the Alan Rickman character in Galaxy Quest. It was in plain sight all along.