Guest Stars Gabrielle Green as Katrina MacKenzie Louisa Connolly-Burnham as Shannon Kelly Mark Fleishmann as Tim Jeffries Shorelle Hepkin as Kay Rachel Teate as Kara Nahom Kassa as Sam Jonathan Raggett as Jimmi Niek Versteeg as Liam Hunter Siwan Morris as Ceri Clara Onyemere as Miss Parrish Letty Butler as Dr. Rebecca Whitewood Cerith Flinn as Aran Mandeep Dhillon as Dacia Shaun Dooley as Kincaid Jacqueline Boatswain as Victoria Sweeney Lisa Marged as Meinir Alun Raglan as Alric Lottie Rhodes as Gwyn Richard Harrington as Gerwyn Jake Shingler as Cadwr Peter Stevens as Ben