When Bjorsen pays the soldier at the fence for information, the soldier states he only receives $21 per month. During WW2, every serviceman received at least $50 per month.
Aberdeen Proving Ground is not Aberdeen Proving Grounds. This is a common misnomer. The sign for APG should not be wrong.
At The Beginning Of The Episode When Andros Arrived On Earth, It Was Night Time In Washington D.C.. The Cars In That Scene Were Those From The Early 1970s Not The 1940s.
When Andros Caused The Eclipse, The Lincoln Memorial Was Seen Three Different Times From A Distance. The Cars Passing The Memorial In Those Scenes Were Cars From The Mid to Late 60's And Early 70's. Not The 1940's.
When Bjornsen, the Swedish journalist who is actually a Nazi spy, is trying to get information out of Etta, he bets her $20 that Andros' demonstration will be held at Fort Meade. The $20 Federal Reserve Note he offers her, shown in close-up, dates after 1963, when the U.S. took itself off the silver standard. If it had pre-dated 1963, it would have read "WILL PAY TO THE BEARER ON DEMAND TWENTY DOLLARS" at the bottom, rather than simply "TWENTY DOLLARS." Until 1963 a dollar was defined as a particular weight of precious metal, and someone could exchange a $20 Federal Reserve Note for twenty actual dollars (silver coins).
Near the end, Steve Trevor points to Baltimore on a road map with interstate highways. No interstate highways existed in 1942.
While Wonder Woman is waiting for Andros to finish his meeting with President Roosevelt, the south face of the White House is shown. The second-floor balcony built during the Truman administration is clearly visible.
Bjornsen, the Swedish journalist who is actually a Nazi spy, was wearing a tie from the psychedelic/hippie days of the 60s and 70s.
When Andros first arrives he says he is only an observer not a judge, then later he says he is judge, jury, and if necessary, executioner.
Even though the episode was set in 1942, General von Dreiberg said that the Germans were about to take Paris. They actually took Paris and defeated France in June 1940.