Claire Foy
Sawyer Valentini
Joshua Leonard
David Strine
Jay Pharoah
Nate Hoffman
Juno Temple
Violet
Aimee Mullins
Ashley Brighterhouse
Amy Irving
Angela Valentini
Sarah Stiles
Jill
Marc Kudisch
Bank Manager
Colin Woodell
Mark
Myra Lucretia Taylor
Counselor
Lynda Mauze
Dolores
Zach Cherry
Dennis
Polly McKie
Nurse Boles
Raúl Castillo
Jacob
Michael Mihm
Steve
Robert Kelly
Steve's Partner
Natalie Gold
Female Patient
Sol Marina Crespo
Female Patient
Will Brill
Male Patient
Steven Maier
Male Patient
Matthew R. Staley
Medical Technician
Matt Mancini
Medical Technician
Emily Happe
Friendly Nurse
Gibson Frazier
Dr. Hawthorne
Erin Wilhelmi
Hayley
Joseph P. Reidy
Lawyer
Matt Damon
Detective Ferguson
Erika Rolfsrud
Medical Examiner
Elizabeth Goodman
TruthBite Editor
Roshanna Jenkins
Federal Agent
Lance Coughlin
Police Officer (uncredited)
Kevin Dean O'Connor
George Shaw (uncredited)
Arthur Shaffer
FBI Agent (uncredited)
Ursula Triplett
Arresting Police Officer (uncredited)