When Kirk dies it was very emotional and very strange, in the moment and all the way through the process. I'd read it in the script and I'd always be struck by what I'd just done and what we were doing, and that this was my childhood hero and I was writing his death.

As frustrating as it gets, at times, and as frustrating as it is, at times, I don't think I've ever considered doing something else, or not wanted to do it anymore. To me, it's just the greatest job. It's a good fit for who I am and what I want to be.

I'm always tempted in the back of my mind to continue to write things in the Star Trek universe, in the novels or the comics, just because I don't get to play in that universe and I don't get to hang out with those characters any more. You spend hours upon hours of your life, day after day sitting in writers' rooms, talking about these people and these situations, and it becomes very real to you. They're friends of yours, in a lot of ways.

When we're shooting, I commute to the UK, every three weeks or so, and that's hard. That's probably the toughest, physically, on me. It's a much longer commute than I've ever had to deal with. And then, there are the challenges of this particular production. It's not the kind of show that has standing sets.

The creative part, with the writing of it and the vision, and finding the voice of a show and the characters, is much harder to teach somebody. It's like music. You can either play it or you can't. If you can't play music and you really struggle and work hard, you can learn, but you have to have some inner gift to take it to the next level.

I think people are screw-ups, and even our greatest heroes are deeply flawed human beings. People make bad decisions for all the wrong reasons, and then somehow they'll do the right thing, and then somehow they'll save somebody, or they'll be compassionate. Horrible people can do wonderful things, and wonderful people can do horrible things.

Now I know that if I'm in a fight or a big argument with executives or the studio or whoever, and it's getting to a point where it's starting to get bad, I don't have to have the fear of, "Am I strong enough to see this through? Would I really make a stand here? Would I really quit over this issue?" And I know in my heart that there is a place where I would walk away. I don't have to make it about my ego. I don't have to make it about whether I'm being strong enough or tough enough.