U.N., the Night and the Music - S11-E10
Continuity mistake: When Col. Potter runs out of his tent to say goodbye to Capt. Lal, he wears only one slipper. When the jeep drives away and Potter's feet once more are visible, both feet are in slippers. (00:22:05)
Answer: The C-42 was a military variant of the Douglas DC-2. Very few C-42's were built, so it's questionable that Potter would specifically have seen that particular model, but, given his military background, it's not entirely unreasonable that he might use the military designation even when the aircraft in question is actually a civilian DC-2.
Tailkinker ★