For me, one of the really cool things about this is that throughout these movies, there have been - and I enjoyed it this way - hints at what S.H.I.E.L.D. is and how they function within this Marvel movie universe which, as you know, is deeply based in the comic books.

Speaking as Coulson, it's unclear. I feel like that are other formidable S.H.I.E.L.D. elements and they don't have Coulson's connection to some of these people. I think what I like about what seems to be going on is there are differing opinions about who's where on the hierarchy and I think that's some of what goes on in the movie.

I feel like I've had a number of roles in suits, which is hilarious to the people who know me, because it couldn't be further from who I am and what I wear. I think that Aaron Sorkin is, to a certain extent, responsible.

When Marvel put together Ultimate Spider-Man and someone came up with the idea of having Principal Coulson, they said, "Do you want to do the voice?" I thought, "I have to do the voice!" Because I have a daughter and we watch some cartoons, I couldn't bear the idea of tuning in and hearing somebody else's voice.

The technology actually seemed to come at just the right time to make the Hulk - Mark Ruffalo was really able to play both characters.

It's a little strange, after all these years of working on camera, but once you start to watch the other people who do this a lot and realize how much of what you're doing has to just come through your voice, I found it really interesting.

I'm just an actor who happened to love these [Marvel] comics when I was a kid, and got to rediscover them.