Maria Dizzia

as Dr. Sullivan

Will Brittain

as William

Waleed Zuaiter

as Dr. Reed

Susan Park

as Sarah

Beth Grant

as Dr. Thomas

Paul Guilfoyle

as President Clayborn

Jerry Wasserman

as Chairman Douglass

Ted Cole

as Ted

David Nykl

as Principal Bernstein

Noel Johansen

as Dr. Winslow

Callum Seagram Airlie

as William, age 10

Christian Convery

as William, age 5

Diana Pavlovská

as Darlene

Gaalen Engen

as Dr. Rowley

Dee Jay Jackson

as Officer Jerry

Krystle Dos Santos

as Stephanie

Finn Haney

as Marcus

Kevin Dzah

as Moosh

Morgan Taylor Campbell

as Judy

Ellie Harvie

as Vice President Becker