When I did Casual, I just let myself put on weight because he's a schoolteacher. He's not meant to be muscle-y.

I went into very deep research as to what exactly that meant and how sociopaths function psychologically and within the world.

My character is called The Hunter. He's the main antagonist in the movie. In a nutshell, he's a slightly deranged natural born killer who's weirdly determined to succeed at his job, whatever his employment is. He's a mercenary and there's a high body count for him in this film [Never Go Back].

I had just come off of doing a play in Los Angeles which actually got me the role. It was called Bent and it was at the Mark Taper Forum. I was playing a homosexual in 1930 to 1934 Berlin who is eventually put into a concentration camp for the second half of the play. I had lost about 38 pounds for that.

The director, Moisés Kaufman, just received the national medal of the arts from President [Barack] Obama . He wrote and directed The Laramie Project and he has directed several Pulitzer prize-winning plays. He's a pretty profound director in the theater.

I change myself a lot. Some roles you don't want to be big, bulky, muscle-y guy and some roles you want to be a lean, marathon-runner physical type. And some roles you just don't want to be in shape.

I'm a trained actor and I can always tone it down, I can always simplify the work I've done. But if I'm asked to bring the nuanced and complicated work, I'll have it in my pocket, and all that information helps.