Chloë Grace Moretz Susannah Cahalan
Charlize Theron Producer
Richard Armitage Tom Cahalan
Tyler Perry Richard
Carrie-Anne Moss Rhona Nack
Jenny Slate Margo
Lee Majdoub Guy
Janet Kidder Dr. Siskin
Lauro David Chartrand-DelValle Stunt Coordinator
Navid Negahban Dr. Najjar
Robert Moloney Dr. Ryan
Nicole LaPlaca Young Nurse
Jessie Fraser Woman
Jason Tobias Associate Producer
Yaron Orbach Director of Photography
Alison Araya EEG Tech
Ken Tremblett Senator
Agam Darshi Dr. Khan
Ross Dempster Production Design
Gerard Barrett Director, Screenplay, Co-Producer
Daniel Bacon Dr. Han
Jenn MacLean-Angus Giselle
John Paesano Original Music Composer
JC Bond Editor
Alex Zahara Allen
Elizabeth Bowen Publicist
Todd Giroux Associate Producer
Thomas Mann Stephen Grywalski
Brian McCaig Intern
Susannah Cahalan Novel
Lindsay MacAdam Producer
Lindsay Navarro Young Waitress
Farnaz Khaki-Sadigh Costume Design
A.J. Dix Producer
Rob Merilees Producer
Lisa Wolofsky Executive Producer
Beth Kono Producer
Vincent Gail Dr. Samson