Polar Air Flight 121 becomes Flight 125 at the airport desk.
The hit man's car, a silver Chevrolet Monte Carlo with the license plate 899 IVC is seen parked along the route taken with Channing in the van at the same time he is following the van in the car.
When Channing is brought into the courtroom to hear the charges against him Jim turns on the tape recorder, but after Jim places a call to confirm Channing used drop B, the tape recorder is now off.
When Whitmore Channing takes the call from his control in Paris during the teaser, his watch clearly reads Wednesday. Yet the control schedules the pickup for 5:00 p.m. "the day after tomorrow, which is Thursday. The watch should have read "Tuesday" during this call.
After the hit man sprints away in his car, the van carrying Channing is seen making a right turn onto a street and continuing down toward an intersection with a wall across from it. The van then continues for some time on a different roadway with the PA speakers playing sound effects. The hit man is then shown driving down the street and catching up to the van as it approaches the wall at the end of the first street shown and makes a left turn.
One of the made-up airlines is named "LINEAS AEREAS ESPAGNA". "ESPAGNA" should read "ESPAÑA".
When Barney winds Channing's watch forward the 'day' window displays 'WED" twice.
Actually, this was something that was necessary for those kinds of day/date analog watches. Because a day is 24 hours long and a watch only "knows" 12 hours, there has to be a mechanism for the watch to distinguish between WED A.M. and WED P.M. If this mechanism didn't exist, the watch might switch from WED to THUR at noon instead of at midnight.
Actually, this was something that was necessary for those kinds of day/date analog watches. Because a day is 24 hours long and a watch only "knows" 12 hours, there has to be a mechanism for the watch to distinguish between WED A.M. and WED P.M. If this mechanism didn't exist, the watch might switch from WED to THUR at noon instead of at midnight.
The Craig TR-404 audio tape recorder Barney connected to the TV to create the fake broadcast could not have possibly produced the picture seen on the screen of the TV set. Such a recorder has absolutely no video capabilities, even black and white. This is the recorder commonly used for the "self destruct tape" sequence.
Phelps makes a bizarre error at the end when he deliberately sets the film negative on fire. Aside from the fact that the Defense Dept. would have needed to know exactly what secrets had been photographed, it would make it impossible to prosecute Channing for espionage, as the only proof of it was burned up. In other words, Phelps made it impossible to convict Channing for spying. One can only imagine how "the Secretary" would react to that.