In which Simpsons episode did Johnny Cash voice the Space Coyote?

Johnny Cash voiced the Space Coyote in “El Viaje Misterioso de Nuestro Jomer (The Mysterious Voyage of Homer).”

The episode is the ninth installment of The Simpsons’ eighth season. It originally aired on January 5, 1997, and follows Homer after he eats extremely hot peppers at Springfield’s chili cook-off. His resulting hallucination sends him on a surreal search for his soulmate.

Cash’s character appears as Homer’s spiritual guide: a mysterious coyote who offers cryptic advice during the vision. The role suited Cash’s deep, authoritative delivery, giving the comic dialogue an unusually solemn sound. Bob Dylan had also been considered for the part, but Cash accepted the offer.

The episode is sometimes shortened in conversation to “The Mysterious Voyage of Homer,” but its official title uses the deliberately awkward Spanish-flavored phrase “El Viaje Misterioso de Nuestro Jomer.” It is unrelated to the episodes “Homerpalooza,” “Bart of Darkness,” and “Homer’s Barbershop Quartet,” none of which feature Cash’s coyote appearance.