Celebrities

The episode entitled "How Are Things In Glocca Morra?" (from the first season) makes no reference to the song in the title. This is because a subplot involving Isaac trying to remember the lyrics to the song (from Sulle ali dell'arcobaleno (1968), incidentally) had to be written out following Robert Guillaume's stroke. The subplot resurfaces in the season two episode "Celebrities".

Jeremy is at a bar making a wireframe out of toothpicks and olives. Then he claims it is a parallelogram. A parallelogram is a 2-dimensional figure; what he was constructing was a parallelopiped, the 3-dimensional solid analogue.