Teddy realizes that if the staff are not going to play fair, then he cannot afford to either. Based on what Teddy has seen so far, Dr. Cawley and his people are much more interested in obstructing his investigation than they are in finding Rachel. However, it is unclear how much Teddy’s bluff will shift their disposition. After all, they do not seem to want him on the island in the first place. As such, his departure might be a welcome development for them. If they are involved in a serious conspiracy, they would presumably prefer a slap on the wrist for failing to aid Teddy rather than getting charged for whatever they are involved in.