The Medal Klink is given has the Maltese Cross on it. Malta was the most bombed country by the Axis in WWII. They never surrendered!
This is the first time where LeBeau's wardrobe changes from a dark blue sweater to a red one.
In the opening sequence, Larry Hovis is shown pumping a lever that raises an antenna. In future shows, he is seen with a chemistry set.
This is the first time Schultz gives his serial number as: 2-6-7-8-9-10.
When Klink delivers his speech, he talks about himself growing up in Dusseldorf, but in season 6 'Hogan's Double Life' he reveals that he grew up in Leipzig. Even went to school there.