Evil Morty's theme is an excerpt from For the Damaged Coda by Blonde Redhead, originally released in 2000, which became widely recognised after Rick and Morty used it for the character in 2014. The track returned in later Citadel episodes, cementing the link between the slow piano and Evil Morty's cold, patient intelligence. Fans began reusing the cue outside the show for any smart villain or hidden mastermind moment, and short clips spread through edits, memes and soundboards because the opening notes alone now signal a twist is coming.