Nickelodeon's green slime went through a variety of recipes. Pete & Pete paid tribute to The Catcher in the Rye. On Pete & Pete, Little Pete's signature red hunting cap was an homage to The Catcher in the Rye's Holden Caulfield. Practically nobody understood the Pete & Pete theme song. Only Mark Mulcahy, who wrote and sang the Pete & Pete theme song, knows what it's really about—or can easily decipher all the words.