Susannah Cahalan, an up-and-coming journalist at the New York Post becomes plagued by voices in her head and seizures, causing a rapid descent into insanity.
Chloë Grace Moretz
Susannah Cahalan
Thomas Mann
Stephen Grywalski
Richard Armitage
Tom Cahalan
Carrie-Anne Moss
Rhona Nack
Jenny Slate
Margo
Tyler Perry
Richard
Alex Zahara
Allen
Jenn MacLean-Angus
Giselle
Ken Tremblett
Senator
Navid Negahban
Dr. Najjar
Robert Moloney
Dr. Ryan
Agam Darshi
Dr. Khan
