I bought a little hideaway up north, so I'll ship my motorcycle up there. It's much less dangerous than West Hollywood.

In a series, you really need to stay open-minded. It's not like a play or a film, where you can create and fully commit to your character's back-story.

People are complicated; you put two of them together and it's generally a mess, but hopefully a beautiful mess.

It's never been a priority for me to concentrate on the likability of the character.

Perhaps 'Big Bang' fans feel so protective of the show because it is, despite being a hit show on a big network, something of a word-of-mouth phenomenon.

As they say, there are two rules in improv: Never say no, and never ask why. When another actor asks 'Why?' or says no to something you're suggesting, then it's very clear that they're putting the onus on you, because they're not comfortable with it themselves.

There is that stereotype of a nerd with the high pants and pocket protector and that kind of thing. That can sustain comedy for maybe a movie - hence the 'Revenge of the Nerds' franchise - but not for hopefully years on the air. It's a sight gag, not a story.