 Noting that the first season focuses on Sam and Dean trying to find both their father and Azazel, series creator Eric Kripke noted that from a storytelling perspective "it "had" to be" that "they'd find both of them at the same time...in the same body".Though the writers modeled Azazel's personality after Al Pacino's demonic sense of humor in the film "The Devil's Advocate", they gave Morgan free rein over the character's mannerisms.Only directed to "be different from John", Morgan changed his voice and mimicked Jack Nicholson's "freaky" speech pattern from "The Shining".