Dane DeHaan as Lockhart

Jason Isaacs as Volmer

Mia Goth as Hannah

Harry Groener as Pembroke

Celia Imrie as Victoria Watkins

Adrian Schiller as Deputy Director

Ivo Nandi as Enrico

Tomas Norström as Frank Hill

Ashok Mandanna as Ron Nair

Lisa Banes as Hollis

David Bishins as Hank Green

Carl Lumbly as Mr. Wilson

Magnus Krepper as Pieter the Vet

Peter Benedict as Constable

Michael Mendl as Bartender

Maggie Steed as Mrs. Abramov

Craig Wroe as Morris

Tom Flynn as Humphrey

Eric Todd as Josh

Jason Babinsky as Carl

Johannes Krisch as Caretaker

Rebecca Street as Lockhart's Mother

Jeff Burrell as Funeral Director

Bert Tischendorf as Lockhart's Father

Douglas Hamilton as 9-Year-Old Lockhart

Leonard Kunz as Frank

Daniel Michel as Denim

Natascha Lawiszus as Bar Girl

Luzie Scheuritzel as Bar Girl

Manon Kahle as Secretary

Adrian Zwicker as Conductor

Julia Graefner as Vet's Daughter

Nino Böhlau as Drawing Boy

Annette Lober as Volmer Institute Staff

Susanne Wuest as Volmer Institute Staff

Godehard Giese as Volmer Institute Staff

Nadine Boeske as Volmer Institute Staff

Judith Hoersch as Volmer Institute Staff

Angelina Häntsch as Volmer Institute Staff

Axel Buchholz as Volmer Institute Staff

David Bredin as Volmer Institute Staff

Matthias Britschgi as Volmer Institute Staff

Andreas Dobberkau as Volmer Institute Staff

Sarah Franke as Volmer Institute Staff

Caspar Kaeser as Volmer Institute Staff

Sebastian Kaufmane as Volmer Institute Staff

Martin Laue as Volmer Institute Staff

Benedict Seifert as Volmer Institute Staff

Roman Schomburg as Volmer Institute Staff

Florian Steffens as Volmer Institute Staff

Sven Timmreck as Volmer Institute Staff

Hanna Wollschlaeger as Volmer Institute Staff

Jef Bayonne as Volmer Institute Patient

Klaus Burckhardt as Volmer Institute Patient

Helmut Boelling as Volmer Institute Patient

Renate Prack as Volmer Institute Patient

Matthias Rick as Volmer Institute Patient

Peter Simlinger as Volmer Institute Patient

Jutta Marina Von Brunkau as Volmer Institute Patient

Johnny Otto as Doctor Barlock (uncredited)

Natalia Bobrich as Nurse (uncredited)

Alexander Yassin as Wall Street Banker (uncredited)

Chris Theisinger as Wallstreet Broker (uncredited)

David Sánchez Calvo as Orderly (uncredited)

Earl Vincent Sherwood II as Ron NYC Driver (uncredited)

Chris Huszar as Wedding Guest (uncredited)

Marko Buzin as Wedding Guest (uncredited)

Matt Lindquist as (voice) (uncredited)