'Michael Moriarty' resigned in at the end of the fourth season after a long, loud battle of words with Attorney General Janet Reno, who was making efforts to censor television violence. He felt that NBC was trying to silence him when two talk show appearances on the network were pulled at the last moment and his role was reduced considerably in the fourth season episode, "Mayhem." Dick Wolf claims this was entirely coincidental. Moriarty claims he was forced into a situation where he had to resign. His character, EADA Ben Stone, also resigned on the show. After quitting the series, Moriarty moved to Canada where he considered forming a political party.