Faith and Cerys find themselves fighting for Osian at the Court of Appeal in London, as Faith meets up with a friend from the past to get information on Rose. Evan continues to keep a watchful eye on Faith's every move, and Steve bonds with Alys.

Cast: Hannah Daniel, Sion Daniel Young, Keogh Kiernan, Marc Antolin, Eve Myles, Bradley Freegard, Matthew Aubrey, Aneirin Hughes, Celia Imrie, Catherine Ayers, Eiry Thomas, Mark Lewis Jones, Demi Letherby, Martha Bright, Lacey Jones