There was never any career plan. When 'Red Dwarf' started I thought we were doing a curious little sitcom on BBC2, I didn't think I was becoming an actor. I didn't see that 21 years later I'd still be talking about it, let alone filming a new one. For me everything's always been an accident.

Critics called me 'egregious' - I had to look that one up - and 'creepy', but now I don't read them, I weigh them.

There was never any career plan. When 'Red Dwarf' started I thought we were doing a curious little sitcom on BBC2, I didn't think I was becoming an actor. I didn't see that 21 years later I'd still be talking about it, let alone filming a new one. For me everything's always been an accident.

Coming from having absolutely nothing to having a few grand in the bank, it was a big culture leap. I think that's why I went off the rails a bit really, 'cause there was no training for it. They didn't do fame in schools.

I've been very lucky, this is my 30th year on TV.

It's evolve or die, really, you have to evolve, you have to move on otherwise it just becomes stagnant.

My life has been, I suppose, the most incredible series of highs and lows.