Revealing mistake: When Castle is gearing up for battle, it shows a close up of him loading a round in a rifle. In one of the rounds the primer has been fired already. (00:30:50)
Continuity mistake: When Marion James has the conversation with Rawlins on the bridge, Rawlins by all miracles isn't blind at one eye anymore. He does still have the scar next to his eye. But the eye itself is okay. (00:44:55)
Answer: He calls him back.