When they are preparing to move Khalek (don't know if that's spelled right), Mitchell asks for the "corporal's" assistance. Amazingly, nobody on set noticed this mistake. If they're really in the Air Force, there wouldn't be a corporal, because corporals only exist in the Navy.
Pertaining to "Corporal"; a Lance Corporal is an E-3 in the Marine Corps, E-4 is "Corporal" in both the Army and Marine Corps. In that particular episode, if the person Mitchell was addressing was in the Marine Corps or Army, that would be correct.
There are NO corporals in the US Navy. I am quite familiar with Navy ranks, I was in for 12-years.
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