"I could retire now. I'm one of the few people that's been in Star Trek, Doctor Who and Star Wars. I did a voice for Clone Wars so I'm in this sort of strange sci-fi trifecta thing, where I've inhabited all three of those universes. So in nerd terms I'm like Tom Cruise. I'm the Tom Cruise of nerds." Self-confessed sci-fi geek Simon Pegg is happy with his career.