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