When Tony is talking with the solicitor's office in London, he is talking on his cell phone. When the camera angle shifts, Tony is then seen talking on the corded office phone at his desk, then the camera angle shifts again and Tony is seen talking again on his cell phone.
While talking to the secretary overseas, Tony is talking on his cell phone. Cut away shot to McGee and back to Tony, suddenly the conversation with the secretary is taking place on his desk phone. Another cut away shot then back again and he is on his cell phone again. There is even a little audio dubbing issue.
The pattern of bullet wounds from the crime scene photo doesn't match the pattern of bullet wounds on the body in autopsy.
After Ziva and McGee call Gibbs to warn him that the assassin is closing in on the AZ party, Gibbs hangs up his satellite phone. After the chase is over, McGee is in MTAC shouting to ask if they are all alright and Gibbs answers them as if still on the phone call from earlier.
When being questioned in the interrogation room, two of SN Zell's ribbons are incorrectly placed: the Global War on Terrorism Service Medal and Navy Sea Service Deployment Ribbon are out of order.
McGee says that he found this cabin in Mt. Pinos. This is actually located near Santa Barbara in California, not in Arizona.
Gibbs and Dinozzo fly to Arizona to find a witness, but the rock formations are actually Vasquez Rocks Natural Area Park north of Los Angeles California.
When Sheriff Boyd, Gibbs and Tony are camping for the evening Tony looks at his watch, which reads a few minutes after 8:00 PM. Less than a minute later Ziva calls Gibbs to tell him that the fake agent has been identified as a contract killer, and that he took a flight to Arizona on a private jet. Ziva tells Gibbs that the plane landed 'Two hours ago", but the brief view of the flight log says that the jet was not scheduled to leave DC until 20;45 (half an hour later than her phone call to Gibbs) and would arrive in Arizona at 02:10.