Jesse Eisenberg character Simon James / James Simon
Mia Wasikowska character Hannah
Wallace Shawn character Mr. Papadopoulos
Yasmin Paige character Melanie Papadopoulos
Noah Taylor character Harris
James Fox character The Colonel
Rade Šerbedžija character Frightening Old Man
Cathy Moriarty character Kiki
Phyllis Somerville character Simon's Mother
Chris O'Dowd character Nurse
Craig Roberts character Young Detective
Kobna Holdbrook-Smith character Guard / Doctor
Tony Rohr character Rudolph
Sally Hawkins character Receptionist at Ball
Kierston Wareing character James' Funeral Date
Paddy Considine character 'The Replicator' - Jack
Nathalie Cox character 'The Replicator' - Jack's Wife
Dirk Van Der Gert character 'The Replicator' - Head Judge
Liam Bewley character 'The Replicator' - Wise Judge
Gemma Chan character 'The Replicator' - Glamourous Judge
Gabrielle Downey character Strange Woman
Jon Korkes character Detective
Susan Blommaert character Liz
Bruce Byron character Skinhead
J. Mascis character Janitor
Karima Riachy character Secretary
Tim Key character Care Worker
Andrew Gruen character Man on Train
Kim Noble character Box Man / 'The Replicator' - Guard 1
Morrison Thomas character Coughing Man
Lloyd Woolf character Investigator
Lydia Ayoade character Well-Dressed Woman at Ball / Test Invigilator
Stuart Silver character Waiter / 'The Replicator' - Guard 2
Chris Morris character Workers' Services Executive
Donal Cox character Priest
Jemma Moore character Snooker Brunette
Joanna Finata character Attractive Bar Girl (uncredited)
