Factual error: When entering the house looking for his wife, he grabs a guy around the mouth and stuns him with a stun gun. He would have been shocked as well. (00:33:00)
Factual error: In the last minutes, the show looks forward to future challenges, in effect a preview of the never-made 3rd series. The oracle says they must find "the golden fleece, woven long ago by the Stygian witches." But the golden fleece, or indeed any fleece, is not a woven fabric. (Today's fleece is a modern invention).
Factual error: While the brothers were fighting with each other, they were interrupted by the flag being raised and stopped fighting to salute the flag. The wrong song was playing when the flag was being hoisted. On real Army bases, Reveille is supposed to play during the raising of the flag, but the show had the end of "To the Colors" (what is played when the flag is being lowered in the evening) playing instead. (00:14:00)
The Banquet - S5-E3
Factual error: During The Banquet, everyone is seated at the dinner table. But Romans famously ate reclining. They should have lain down to eat.
Factual error: When asked about a trial Sebastian Berger replies that there was a jury verdict on a trial that took place in Germany. Germany has no jury based court system.
Factual error: The FBI agent introduces himself and says "Mike Weston - I did my thesis on Joe Carol at the academy." FBI agents are required to have a university degree, but they don't write thesis' at the academy. A person is either in a university or at Quantico getting trained. They are not writing papers at Quantico. They need the degree beforehand to get in. (00:10:30 - 00:11:30)
Factual error: The events of the first season take place in 1962, however, the JAG lawyer representing Sergeant Jenkins wears the Vietnam Service ribbon, authorized in 1965, and the Vietnam Campaign Ribbon, authorized in 1964.