A Weak Link - S1-E22
Revealing mistake: When Gibbs and Todd are walking into the church, the camera shadow can be seen going over the seats on the left hand side. There is no-one other than Gibbs and Todd moving and the shadows are not possible from them. (00:25:00)
A Weak Link - S1-E22
Audio problem: When Gibbs tells DiNozzo to check every rope and D-link, DiNozzo says "You got it boss" however his mouth only says "You got it" (00:17:00)
A Weak Link - S1-E22
Continuity mistake: When DiNozzo and Gibbs are looking around the garage, DiNozzo starts to put his gloves on. Camera cuts and he's holding his gloves again. (00:12:00)
Chosen answer: It is never stated, however she must have been there several years if she is on presidential detail.