The marks around Tony's eyes caused by the prank Ziva plays on him with the binoculars change during the scene.
In episode 3.18 (Bait) the tape-loop idea was suggested by Tony and used by McGee and Abby to resolve the crisis. McGee and Abby act in this episode as if the tape-loop idea was something they had never done before in resolving a crime.
As the door closes and Gibbs tells McGee he's not off the hook until the radar is found, a finger can be seen creeping over the upper left screen.