"If I see a movie for the first time on DVD, I watch it all the way through, the lights are down, I don't pick up the phone. The third or fourth time you see a movie, sometimes you just have them on and you check in every once in a while with things that you liked. I think it's a different expectations from that environment."

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Particularly, the actors, to have analyzed the script in great detail from the point of view of their specific character. So that they have a handle on exactly where the character is in the chronology of things. In that sense the actors become your best check on the logic of the piece, and the way in which it all fits together. They become essential collaborators. The main thing is you have to work with very smart actors.

— Christopher Nolan