When the sheriff is chasing Dylan and Troy the license plates on his car change from civilian plates to "E" exempt plates normally used on law enforcement cars.
After rescuing the Jews Jamie Hamilton says that with the time being past midnight it was now June 6, 1944, meaning the D-Day landings have begun. In the next scene, a senior Nazi officer tells another officer that the Allies have begun landing in Normandy. Though the American Airborne and British Glider Assault did occur at night, the landings at Normandy did not take place until 6:30 in the morning.
Some of the trains at Peenemünde have modern American freight cars.
In the first shot of Dylan and Troy fleeing the Sheriff, the trailer their motorbikes are fixed on can be seen in the lowermost part of the frame.
The early part of the episode is set in June 1944 and supposedly shows the first V-2 rocket test. The first successful V-2 test launch was actually in June 1942.
One of the German soldiers has a 1970s style mustache.
Although concerned about keeping Troy and Dillon's ships being found a secret, the Air Force doesn't seem to mind letting a school bus into the area to pick up Willie for school.