Cillian Murphy as Dr. Jonathan Crane / The Scarecrow
A psychopharmacologist who works at Arkham Asylum and has developed fear-inducing toxins. He takes on the persona of the Scarecrow to use during his experiments, in which he uses his patients as human guinea pigs for his toxins. He works with Ra's al Ghul and Carmine Falcone. Nolan decided against Irish actor Murphy for Batman, before casting him as Scarecrow.[20] Murphy read numerous comics featuring the Scarecrow, and discussed making the character look less theatrical with Nolan. Murphy explained, "I wanted to avoid the Worzel Gummidge look, because he's not a very physically imposing man he's more interested in the manipulation of the mind and what that can do."[21]