Leon Addison Brown as Steven Joyner

Mark Boone Junior as Dr. Eduard Gillespie

Evan Jonigkeit as Dr. Raphael Clearwater

Jeffrey Wright as Vincent Daugherty

Whoopi Goldberg as Dr. Andrea Hart

Brooks Ashmanskas as Todd Jenkins

Lewis Black as Roy Altman

Joel de la Fuente as Mark Nava

Hunter Parrish as Milo Kramer

Alec Baldwin as Proctor Carlisle

William Atticus Parker as Anton Kantoliev

Steven Maier as Bradley Atkinson

David Pittu as Domonick Calderon

Andy Karl as Greg Meyers

Ward Horton as Miles Zimmerman

Michelangelo Milano as Frank Webster

Jaden Michael as Gregori Kantoliev

Sabina Friedman-Seitz as Kate Sullivan

Dan Finnerty as Levi Walker

Will Hochman as Charles

Adam Piacente as Alan Kantoliev