When Riggs is talking to Agent Palmer about being hungry, he's holding one red folder. When he asks if she was going to eat, he sets the folder down. In the next shot, he's holding a folder again.
In this episode, Dan Cooper hijacks and robs the passengers, then jumps out of the plane mid-flight with over $1 million of goods. In 1971, a man identifying himself as "Dan Cooper" (later misidentified by the media as "D.B. Cooper", which ended up being the more popularised epithet) hijacked a plane and jumped out of the plane in mid-flight with over $1 million.