I Ka Wa Ma Mua, I Ka Wa Ma Hope - S8-E10
Factual error: If you put explosives on drywall it will obliterate it, not put a small hole in it.
Factual error: In Steve's office behind his desk is a model of CVN 65 USS Enterprise. The island superstructure is back to front with the Bridge actually facing the rear. This glaring error is present in all episodes to date.
Chosen answer: They are Junior's SEAL buddies.