When he accepted the role, Fonda came to the set with brown contact lenses and facial hair. Fonda felt having dark eyes and facial hair would blend well with his character's evil, and also help the audience to accept this "new" Fonda as the bad guy, but Leone immediately told him to remove the contacts and facial hair. Leone felt that Fonda's blue eyes best reflected the cold, icy nature of the killer. It was one of the first times in a Western film where the villain was played by the lead actor.