Guest Stars Faye Marsay as Joanne Aspinall Steven Cree as Joe Kallisto Alastair Mackenzie as Guy Riverty Nell Williams as Sally Kallisto Rico Canadinhas as Fergus Riverty Indeyarna Donaldson-Holness as Lucinda Riverty Leo Ashton as Sam Kallisto Macy Shackleton as Abby Hill Charlie Carrick as Winston Hill Camilla Marie Beeput as Alexa Gerald Kyd as Scott Elias Jake Hayes as James Kallisto Carl Rice as Pete Toovey Audrie Woodhouse as Louise Elias Dave Cooper as Paramedic