Geraldine Somerville
— Dr. Samantha Graham
Kelly Reilly
— Fiona 'Finn' MacKenzie
Seán Gleeson
— Danny Hyde
Robert Bathurst
— Dr. Adam Daley
Phil Davis
— Det. Inspector Baird
Isobel Middleton
— Sarah
Polly Moore
— Det. Inspector Hearst
Laura Jane Keston
— Elsie
Emily Keston
— Elsie
Jane Robbins
— Kirsty's Mother