As Adam is packing up all of his E.T. related items into a milk crate, one of the items appears to be an Atari game cartridge. The Atari E.T. game was very famously touted as being almost unplayable and was (along with several other Atari games) collected up and buried in a landfill in Alamogordo, NM. A documentary about this called "Atari: Game Over" was released in 2014. This would have made this one item of Adam's a very sought after collector's item.
On the back wall of Calabasas' studio, one of the glamour shots is actually of Hayley Orrantia.
First guest appearance by Rob Huebel as "John Calabasas".
The song played during the final scene is "Kokomo", by The Beach Boys.
George Segal and Paul Sorvino were in "A Touch of Class" 1973.