Continuity mistake: During the investigation of the dead wife's crime scene, the arms of the corpse change position from shot to shot throughout the scene, including a moment where the corpse's arms are crossed, then in the next shot Ducky is shown crossing her arms. Ducky is also shown crossing the same arm twice, and the guitar control also changes direction and position with respect to the body. (00:03:20 - 00:05:30)
Continuity mistake: After Vance tells Gibbs to pack a bag because he'll be joining Tony in Cartagena, when it cuts to McGee he places his brown paper bag on the desk with the folded flap facing away from his keyboard, but next shot the bag faces the opposite way. (00:18:30)
Character mistake: McGee seeks Director Vance's permission to hack into the Sea Hawk's computer system. He says that in the past four months, he hasn't worked any crime scenes, etc. This is incorrect, as near the start of the episode, he and Ziva go to an officer's home to advise his wife that he is missing. They discover her murdered and then the team, including McGee, are working the crime scene.
Continuity mistake: After Senator Kiley asks Gibbs to keep his name out of it until after the vote, it cuts to Ziva holding Carrie McLellan's Academy graduation photo (gold frame looks like an 8x10). In the closeup Ziva places the framed photo back on the shelf, but that photo vanishes from the shelf in following shots. When Gibbs walks in, it seems that photo is on the table beside the couch. (00:07:30)
Continuity mistake: When Gibbs and his father drive up to Winslow's house, in the shot facing Jackson he holds out the bottle of Kentucky bourbon with his left hand, but in the next shot facing Gibbs it's held out in Jackson's right hand, then it's back in his left hand. (00:18:45)
Continuity mistake: Episode "Heartland": In the first five minutes of the show, after the guys are beaten up in the alley, when the black guy is laid down on the ground there is a blood stain on The Wall, behind where he was standing. When the other guys go to the white guy's aid the blood stain is gone, for about 3-4 shots. When the NCIS team is there gathering evidence the blood is back on The Wall.