"Peaky Blinders: The Immortal Man" writer Steven Knight has explained why he had to kill off a main character in the show, Arthur Shelby, off-screen. The film, which follows the death of Tommy Shelby's sister Ada and subsequent death of his older brother, Arthur, reveals that Tommy Shelby murdered his brother with his own bare hands in a drunken rage. This decision is expected to leave fans feeling left-handed, but Knight explains that he knew it had to be done. Despite his many mistakes throughout the series, Arthur was a fan-favorite throughout the show and had a turbulent relationship with Tommy. The writer also explained that Tommy's desire to shed light on his brother's actions and that Arthur had always been a loyal character.