Indira Varma

"There's a difference between knowing it or reading it, and seeing it. When I first read it, I was like, "Okay, it's real." But for me, it was more words or ideas; a conversation. And it turned out to be just real facts! It's set in the future, of course, but it was there. And I felt more concerned."

"I had to read up a little bit on geoengineering, and the pros and cons of it, because I didn't really know that much about it. I needed to understand what her viewpoint was in order to be able to enter into that debate with her ex-husband, Jonathan. I needed to be convinced by why she was choosing that. That's kind of what I did."