Reese gets in the back of Carter's police car, in the prisoner hold space, and when they are done talking, he opens the door and gets out. The rear doors can't be opened from the inside, for obvious reasons.
Technically, a wolf offspring is called a pup, not a cub.
Mr. Reese is supposed to be a an ex-military ex-CIA agent. However, when Darren mentions the word "ronin", he acts as if he's never heard it before and Darren needs to explain what a ronin is. However, he could be just flattering a young boy to allow him to show his "superior" knowledge.