Happy Valley star Charlie Murphy has said that she was "overwhelmed by how good" her character's ranting scene was when she read it in the script for last week's episode.
The actor, 34, plays Ann Gallagher on the BBC show, which will conclude its third and final series on Sunday. She has played the role since its first series, which aired in 2014.
The character was raped and abused by Tommy Lee Royce (played by James Norton ) in the first series. She later joined the police force and remains one of the main characters.
