Benedict Cumberbatch

Stephen Lewis

Kelly Macdonald

Julie Lewis

Stephen Campbell Moore

Charles Darke

Saskia Reeves

Thelma Darke

Andrea Hall

Policewoman

Jim Creighton

Male Neighbour

Franc Ashman

Lydia Webb

Anna Madeley

Rachel Murray

John Hopkins

Home Secretary

Elliot Levey

Prime Minister

Lucy Liemann

Joanna Buckley

Laurence Spellman

Greg Ellis

Richard Durden

Stephen's Father

Geraldine Alexander

Stephen's Mother

Gerard Monaco

Estate Agent

Karen Bryson

Mrs. Matterson

Doreene Blackstock

Nurse

Eloise Henwood

School Girl (uncredited)