Ross Marquand as Sean

Sarah Bolger as Andrea

Susan Wilder as Aunt Robin

Charlene Amoia as Laurie

Dan O'Brien as Christian

Brandon Scott as Dr. Witten

Alexandra Barreto as Patricia

Aisha Kabia as Dr. Lilliard

Peter Cilella as Dad

Clare Cooney as Dr. Sturgill

Emily Pendergast as Kimmie

Martin Garcia as Chuck

Parvesh Cheena as Principal Kakkar

Andre Hyland as Franco

Ramiz Monsef as Nurse

Alex Ruiz as Elton

Madelynn Joy Stuenkel as Creature

Kyra Elise Gardner as Restrained Abductee

Christina Mosti as Woman in Birthing Class

Abby Wilson as Woman in Birthing Class

Georgia Bishop as Woman in Birthing Class