The image of the airliner during the opening sequence was reversed and there was no airline name on it, just the reversed wording, "Boeing 707".
Admiral Nelson wears four stars on his collar. In all previous episodes, Nelson wore three stars. In subsequent episodes, Nelson again wears three stars on his collar.
When Schroder mention's Hitler's dream of a 1,000 year Reich Nelson responds by saying that it lasted only 19 years. This is wrong. Hitler became Chancellor in January 1933, and the war ended in May 1945, a total of 12 years.