Greatest American Hero, I really dug that as a kid, because it had an alienation to it, where he was given a gift and didn't know why, and yet he was forced to do something with it and he was very much an out-of-place character who was trying to cope with his own surroundings, and I can kind of relate to that guy.

I tried my best [on audition for X-Files], and it worked out. I got the part. So I was flabbergasted.

This particular one was very, very heartwarming and is the relationship of an older man and a young boy that are essentially on the run. And so yeah, as I say, Barry Crump wrote a lot of books and this one got into the hands of Taika Watiti who then writing the screenplay decided to really vamp up if that's the word, or ramp up and modernize certain phrases - getting in the humor. So he added a lot of a real comedy perspective onto it which is what I think the story needed anyway, especially for it to turn into a film. And it worked.

You've got to have a likeability factor, I think, in your comedy characters. If the guy's really, really funny but you just don't like him or her, then you're never going to root for them.

It's a funny thing because it's what the people say when they come across a ghost situation is that it does freak you out, but then you do get over it - for some reason you're not scared to come across it again.

I think when I'm cast in things, people take that as part of the package that I would like to have some sort of creative control and they know what I'm capable of, so they let me come on the day with my own ammunition.

I think Psycho Sam is closer to the real me in some ways which is frightening to admit, but I guess... I mean, I'm definitely into the paranormal.