The Exorcist - Teaser Trailer (HD) (1973)

An innocent girl “Regan“ (Linda Blair) inhabited by a terrifying entity, her mother “Chris“ (Ellen Burstyn) is frantic to resolve to rescue her and two priests “Karras“ (Jason Miller) & “Merrin“ (Max Von Sydow)- one doubt-ridden, the other a rock of faith - who come together in a battle of ultimate evil.