Subtle: meaning not the annual Christmas episode where a character dreams that he’s Ebenezer Scrooge.
I saw this twice in the same week: syndicated episodes of 30 Rock and Modern Family, that ended with a parody of the famous final shot of The Godfather (closing the door of Michael’s office in Kay’s face)
Or the 30 Rock episode where Tracy is developing a porn video game, that’s one long parody of Amadeus.
And The Simpsons did this all the time – like the episode where Homer is suddenly Flanders’ best friend, that includes a parody of Terminator 2.
These tickle my inner movie geek - I feel like “I get it! Ha! I’m cool!”