Other mistake: Right at the start, as they're crashing, the computer narrates their rapidly-dropping altitude in feet. But the "altitude" dial we're shown is in metres. Most noticeable as they cross the 3,000 mark, when the computer voice and the height say/show the same number at the same time, despite the different units. 3,000m would be more like 9,000 feet, or 3,000 feet would be more like 1,000m. (00:03:20)Jon Sandys
Other mistake: One of the episodes shows John at a Marine base camp. It shows him wearing Army fatigues, and in Episode 7, Maureen jokingly says "weren't you a Navy SEAL?" right after he fails to throw this hook to get to safety from a tar pit. So what is he? A soldier? Marine? SEAL? Can't be all three.