Famke Janssen as Katherine Carter

Rose Williams as Lina Carter

Alex Hassell as Dr. Robert Lawrence

Finn Cole as Jamie Carter

Anna Friel as Nurse Nicky Mackenzie

Georgia Thorne as Young Lina

Toby Ryan as Young Jamie

Karl Collins as Neurosurgeon

Lesley Molony as Doctor

Chris Hallaways as First Arborist

Rachel Holifield as Second Arborist

Cameron Robertson as Landlord

Hope Delaney as Katherine's TV Daughter