They are both correct. The meanig may differ depending on the version. Nurdug51, please tell what you want to say, to make the final choice.
". . . at the cinema."He is in the cinema or he is at the cinema?
I agree with Andy (post #13): Neither. It would be ". . . from the cinema". When you pick up something that isn't yours and take it away with you, you steal from.Would it be "the 3 D glasses he's stolen at the cinema" - or "in the cinema"?