Tom Hiddleston as Dr. Robert Laing

Elisabeth Moss as Helen Wilder

Sienna Miller as Charlotte Melville

Jeremy Irons as Anthony Royal

Luke Evans as Richard Wilder

Reece Shearsmith as Nathan Steele

Dan Renton Skinner as Simmons

James Purefoy as Pangbourne

Peter Ferdinando as Cosgrove

Stacy Martin as Fay

Keeley Hawes as Ann Royal

Sienna Guillory as Jane Sheridan

Augustus Prew as Munrow

Julia Deakin as Jean

Tony Way as Robert the Caretaker

Leila Mimmack as Laura

Bill Paterson as Mercer

Enzo Cilenti as Talbot

Louis Suc as Toby

Emilia Jones as Vicky

Neil Maskell as P.C. White

Alexandra Weaver as Lucy

Victoria Wicks as Miriam

Joseph Harmon as George

Dylan Edwards as Dominic

Toby Williams as Bobby

Siobhán O'Kelly as Suzie

Maggie Cronin as Mrs. Munrow

Patrick Fitzsymons as Mr. Munrow

Eileen Davies as Mrs. Hillman

Kenneth Hadley as Mr. Hillman

Patrick Buchanan as Gym Instructor

Colin Ash as Kid's Party Dad

Colin Carnegie as Resident

Michael Condron as Delivery Man

Richard Croxford as Upper Floor Resident

Graham Duff as Queue Person

Matt Faris as Barricader

Karen Hassan as Young Woman

Monique Kelly as Wine Woman

Faolan Morgan as Groping Man

Chris Patrick-Simpson as Shopper

Sara Dee as High-Rise (voice)

Fenella Woolgar as Radio (voice)