Goof: American soldier Farnetti, refers to training at Fort Benning, Virginia. Fort Benning is in Georgia, not Virginia.
Goof: In the MTC garage at the end of the episode a film poster for The Postman Always Rings Twice can be seen behind Sam as she's working on a car. The film was not released until 1946, six years after the setting for the episode in October 1940.
Andrew and Sam go to a 6pm showing of "Gone With The Wind" (which is nearly 4 hours long) yet when they come out of the cinema it's still bright daylight. The episode is set in November 1940, when Britain was working on one hour of daylight savings (the famed "double summer time", i.e. GMT + 2 hours, wasn't introduced until 1941) - however in normal circumstances it would get dark in Hastings at around 5pm in November, so if they went to a 6pm showing (GMT+1) it would already be twilight when they went into the cinema, and pitch black when they came out.
"Eagle Day" was the codename that the Germans used for the start of the Battle of Britain.
'ccomley' writes -
Andrew Foyle is shown around one of the Chain Home radar stations, and both then and later during the test flight, we are shown pictures of a radar screen. This is the "traditional" circular screen with a revolving radius lighting up "blips" as it passes them.
Only radar screens didn't look like that in 1939. There were no rotating antennae. Chain Home used two separate fixed arrays (we did see the towers in the ep) which can only tell distance, not direction. Direction is calculated by taking readins from bothe the orthoganal arrays.
The radar screen from each array looks more like an oscilloscope screen - a horizontal green line with peaks and troughs, the further the peak from the edge of teh screen, the further out the "return".
The ship in the opening scene is a King George V class battleship; the first of which (King George V) was not completed until 12 November, 1940, six months after the episode occurs.