City of the Living Dead (1980)

In the small New England town of Dunwich, a priest commits suicide by hanging himself in the church cemetery which somehow opens the gates of hell allowing the dead to rise.

Peter, a New York City reporter, teams up with a young psychic, named Mary, to travel to the town where they team up with another couple, psychiatrist Jerry and patient Sandra, to find a way to close the gates before All Saints Day or the dead all over the world will rise up and kill the living.