Dr. Hopkins
Detective Zane
Alexander Tatum
Sienna
Scott
Kristen
Jason
Shannon
Ben
Dr. Sanger
Dr. Christensen
Cooper
Sheriff Baxter
Officer Tatopoulos
Ronnie Moon
Dr. Brooks
Security Guard Robinson
Dr. Flaherty
Ruben
Young Alexander's Mother
Young Alexander
Young Zane
Young Sienna
Dr. Maslar
Dr. Quist
Voightman
Security Guard Skinner (as Daryl 'Chicago' Cruz)
Johnny the Corpse
Jake the Joker
Nurse Melody (as Amber Bollinger)
Bruce the Henchman
Medical examiner
Wife
Detective Celentano
Husband (as Charlie Cooper)
Dr. Dragone
Orderly Johnson
Intern (as Dani Kelly)
Nurse #2
Nurse #4
Nurse #1
Nurse #3