In 2016, Newton began portraying Maeve Millay in HBO science fiction drama series "Westworld", for which she won the Primetime Emmy Award for Outstanding Supporting Actress in a Drama Series, among other accolades. In 2017, she served as a narrator for the documentary entitled "Bill Cosby: Fall of an American Icon", an exposé on the sexual assault charges laid against Cosby, which aired on BBC One. In the same year, Newton played DCI Roseanne "Roz" Huntley in the fourth season of BBC One's Line of Duty, a role for which she received a BAFTA TV Award nomination for Best Actress.