Wiegel's New Boyfriend - S2-E2
Deliberate mistake: After the credits, the word "Briefing" is spelled "Breifing" in the shot with the caption "Morning Breifing 6:58 A.M." (00:01:15)
Yankee White - S1-E1
Deliberate mistake: Fornell doesn't recognize Gibbs, but subsequent episodes establish they have a long history together.