Thora Birch

as Liz Dunn

Desmond Harrington

as Mike Steel

Keira Knightley

as Frances 'Frankie' Almond Smith

Laurence Fox

as Geoff Bingham

Embeth Davidtz

as Dr. Philippa Horwood

Steven Waddington

as DCS Tom Howard

Emma Griffiths Malin

as Daisy

Kelly Hunter

as DI Chapman