Supernatural season 1 episode 10

Episode title: Asylum

Air Date: 2005-11-22

Genre: Drama   Fantasy   Horror   Mystery   Thriller

Sam and Dean investigate an abandoned sanitarium and discover that when the hospital was open, the patients held a revolt against the cruel and unusual punishments inflicted by the head doctor. While the brothers search the premises for four lost college students, the tortured spirits cause them to go insane, turning Dean against Sam.