Tom Hiddleston Dr. Robert Laing Elisabeth Moss Helen Wilder Sienna Miller Charlotte Melville Jeremy Irons Anthony Royal Luke Evans Richard Wilder Reece Shearsmith Nathan Steele Dan Renton Skinner Simmons James Purefoy Pangbourne Peter Ferdinando Cosgrove Stacy Martin Fay Keeley Hawes Ann Royal Sienna Guillory Jane Sheridan Augustus Prew Munrow Julia Deakin Jean Tony Way Robert the Caretaker Leila Mimmack Laura Bill Paterson Mercer Enzo Cilenti Talbot Louis Suc Toby Emilia Jones Vicky Neil Maskell P.C. White Alexandra Weaver Lucy Victoria Wicks Miriam Dylan Edwards Dominic Toby Williams Bobby Siobhán O'Kelly Suzie Maggie Cronin Mrs. Munrow Patrick Fitzsymons Mr. Munrow Eileen Davies Mrs. Hillman Patrick Buchanan Gym Instructor Colin Carnegie Resident Michael Condron Delivery Man Graham Duff Queue Person Karen Hassan Young Woman Chris Patrick-Simpson Shopper Sara Dee High-Rise (voice) Fenella Woolgar Radio (voice)