Chloë Grace Moretz Susannah Cahalan
Charlize Theron Producer
Richard Armitage Tom Cahalan
Jenny Slate Margo
Carrie-Anne Moss Rhona Nack
Tyler Perry Richard
Alison Araya EEG Tech
Daniel Bacon Dr. Han
Nicole LaPlaca Young Nurse
Navid Negahban Dr. Najjar
Janet Kidder Dr. Siskin
Jessie Fraser Woman
Jason Tobias Associate Producer
Yaron Orbach Director of Photography
Lauro David Chartrand-DelValle Stunt Coordinator
Agam Darshi Dr. Khan
Ross Dempster Production Design
Gerard Barrett Director, Screenplay, Co-Producer
Jenn MacLean-Angus Giselle
Robert Moloney Dr. Ryan
John Paesano Original Music Composer
Lee Majdoub Guy
JC Bond Editor
Alex Zahara Allen
Elizabeth Bowen Publicist
Ken Tremblett Senator
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