I was /facepalming preemptively at the thought of young Bruce discovering the cave in this episode. I was hopefully wrong.
Overall I liked the episode, Gordon/Medic stuff was funny, I didn't know much about Scarecrow, now I do.
Penguin was ok, I really liked the little speech he gave to Gordon. "Better to be with a friend in the dark that alone in the light". Very nice.
I may be among the few ones that like ( or don't dislike ) Fish, I found her part fun too ( she is a tough cookie to use American slang ).
Like a previous poster said, young Bruce is the least interesting part of the show at the moment.