La acción humana
"Of Human Action" featured two songs, "Subtle Duck" by Charles Bissell and "Angel Love" by Samantha James. In honor of "The Simpsons" 20th anniversary, several shows in Fox's lineup contained references to the show. In "Of Human Action", Tyler uses a Homer Simpson Pez dispenser to store his mind-control drugs, and the town he and Peter journey to is Springfield, the same name of the town in "The Simpsons"; when Springfield appears in the sky, no state is shown, just like the ambiguity concerning the home state of "The Simpsons".