In the opening, Lowell called Fay and asked if she had Prince Albert in a can. A couple of generations ago Prince Albert brand pipe tobacco was sometimes available in pocket-flask shaped tin cans, convenient to put in your coat pocket.
One of several episodes missing from streaming services, most likely due to copyright issues.
First time viewers can see the airfield control tower from the inside, and the air-traffic controller is identified by name: Walter.
In class, Joe says that an airplane is an incredibly complicated piece of machinery. Airplanes are, and always have been, mechanically much simpler than automobiles. Flying a plane, however, is much much more complicated than driving a car.