It’s often interesting when you know about the reference to something as opposed to the thing itself.

For example: I knew the show Mathnet on Square One on PBS before I knew Dragnet existed. I’m also pretty sure I’ve seen all of Citizen Kane from watching The Simpsons but never have actually seen Citizen Kane. I’ve heard there is no cane in Citizen Cane.

What are some references you knew about first before the thing it was based off of?