Homer says he based Angry Dad's voice, in part, on Walter Matthau. Dan Castellaneta did in fact base Homer's voice on Walter Matthau in the first season.
Features Ricky Gervais' controversial hosting at the 68th Golden Globe Awards, with sign featuring a picture of him with a caption that says "Do Not Allow This Man To Host".
When Bart receives his Oscar, the word "Banksy" is written on the wall stage right. Banksy is an anonymous British graffiti artist, political activist, film director and painter who has never been identified (and who did the opening credits couch gag earlier in the season).
This is a sequel to "I Am Furious Yellow," released in 2002.
There are also animated film parodies in the form of posters: The Lyin' King is a parody of The Lion King. Monsters, Ltd. is a parody of Monsters, Inc. Kung Fu Koala is a parody of Kung Fu Panda. The Not-So Incredibles is a parody of The Incredibles. Also Mixar is a parody of Pixar.