“Diminishing Returns” brings back the uncredited character in this show – New York City herself – and has an entertaining case that keeps us engaged while the characters work to re-establish their balance. But that isn’t the story that has me invested. They’ve been teasing us since the end of last season with breadcrumbs of Neal’s mysterious past. Thanks to some well-placed questions, we might be pulling back the curtain that’s shrouded the real Neal from everyone who cares about him.