Continuity mistake: Agent Todd is standing there coat open, hands in her pockets on Air Force One watching Gibbs walk away when the bad guy who is a reporter (Leonard) comes up to her and comments "Loosening your dress code Kate". Seconds later when she turns to indicate that he should return to the press section her coat is now buttoned up.
Continuity mistake: At the end the little boy tells Gibbs the password he has chosen for his tree house. As he does, Gibbs is working on the railing at the opposite end to the ladder. Gibbs says it's a good password and to come up. However he is now at the end of the railing by the ladder.
Continuity mistake: When talking to the warehouse manager, the manager has a clipboard with pink post it notes on. Watch closely and you will see the clipboard is constantly facing different directions as indicated by the pink post it notes. It some shots it's facing away from the manager, and in others it's facing the manager.