[Since its not like Tony wants him around anyway and Clara is, well, gone, Bruce more or less decided to stick with the Doctor, since he figures he should make sure he doesn't run to his death or something. Only god knows what the alien might do.
Dressed in loose clothing with a cloak over it, he trails after the Doctor, expression impassive as he glances at the alien waving his... whatever it was about.]
A piece of paper isn't going to get us through, Doctor.