" ARTHUR: He's out.
ARIADNE: Wait, Cobb-I'm lost. Whose subconscious are we going into?
COBB: Fischer's. I told him it was Browning's so he'd come with us as part of our team.
ARTHUR: (impressed) He's going to help us break into his own subconscious.
COBB: That's the idea. He'll think that his security is Browning's and fight them to learn the truth about his father. "

― Christopher J. Nolan , Inception: The Shooting Script