Guest Stars Harry Unsworth as Rhodri Howells Oscar Unsworth as Rhodri Howells Demi Letherby as Alys Howells Aneirin Hughes as Tom Howells Mark Lewis Jones as Steve Baldini Hannah Daniel as Cerys Jones Lacey Jones as Megan Howells Eiry Thomas as DI Susan Williams Catherine Ayers as Lisa Connors Bradley Freegard as Evan Howells Suzanne Packer as Delyth Lloyd Rhian Morgan as Marion Howells Martha Bright as Angie Baldini Sion Daniel Young as Gareth Taxi Celia Imrie as Rose Fairchild Keogh Kiernan as Osian Matthew Aubrey as Mike Taylor Maria Pride as Julie Penry Marc Antolin as Professor Rhys Isaiah Cai Forrest as Lewis Kev McCurdy as Joe Price Rachel Cheung as Gym Manager Bence Kalo as Dr Macon
