Peter McDonald
as David
Anna Maxwell Martin
as Theresa Wescott
Rachael Stirling
as Helen Bardwell
Rhashan Stone
as Fraser
Jonas Armstrong
as Gareth Boyd
Jodie McNee
as Jean Boyd
Ken Nwosu
as Eddie
Amelie Bea Smith
as Eva
Fraser Holmes
as Ben
Tia May Watts
as Georgina
Jim Howick
as DS Robin Park