Continuity: In the scene where Tom Cruise is crossing over to Mud Island, you can see the reflection of the rotor blades form the helicopter that is filming on the monorail car.

Continuity: As Tom Cruise is leaving Mud Island on a monorail car he passes another car with a Firm henchman in it. They see each other and the man gets out and runs across the bridge to catch Tom as his car stops. This is impossible since there are really only two cars which end up on both sides at the same time.