Thomas Pynchon and James Caan guest voice as themselves as Marge won’t let a little thing like “not cheating” prevent her from winning a baking contest [in which Homer is unwittingly competing against her]; Bart takes up a “swinging bachelor” lifestyle after finding Homer’s discarded “Playdude” magazines.
To whet your appetite, take a look at Roz Chast’s “Thomas Pynchon’s Evil Twin,” a cartoon from the November 9 issue of The New Yorker. As exhibitionistic as the famous author is reclusive, the evil twin is depicted saying:
Mud-wrestle in my underwear on national TV while holding up a new copy of my book? NO PROBLEMO!