David Tennant as Alan Hamilton

Sarah Parish as Tricia Hamilton

Harry Treadaway as Dean Hamilton

Jacob Theato as Joel Hamilton

Jay Simpson as Johnathan

Jo McInnes as Gwen

Jim Carter as Mr. Lockwood

Ron Donachie as Len Hamilton

Anne Kidd as Shirley Hamilton

Jo Hartley as Vicky Nathan

Charlotte Palmer as WPC

Sarah Paul as OT

Andrew Wisher as Neighbour 1

Sue Elliott-Nichols as Neighbour 2

Glen Davies as Headway Volunteer

David Maybrick as Firefighter

Penelope Beaumont as Interviewer

Pooky Quesnel as Homeowner