When you start talking about the known knowns and the unknown unknowns, you're thrown into a crazy meta-level discussion. Do I know what I know, do I know what I don't know, do I know what I don't know I don't know. It becomes a strange, Lewis Carroll - like nursery rhyme.

I like to think that one of things I've done with non-fiction since the very beginning is to find new ways of telling true stories.

My stuff always starts with interviews. I start interviewing people, and then slowly but surely, a movie insinuates itself.

I like to think that I differ from other interviewers in the sense that I hide my agenda more successfully, and I'm more open to hearing stuff that is surprising and unexpected. That I'm actually involved in an investigation, through monologue, at times.

In fact, part of the Netflix series is drama.Beyond re-enactments. Why not invent something new?

The smarter people I know declined to watch the most recent debate [with Donald Trump].

I probably wouldn't have done [ Fred Leuchter story] if it was just a story about an executioner or a holocaust denier, but the combination of the two elements was irresistible. So yeah, I find it strange that there are so many people out there now.