Mrs. Baylock

Mrs. Baylock is a fictional character - and the secondary antagonist - of the 1976 horror film The Omen, as well as it's 2006 remake. In the original 1976 film, she is played by Billie Whitelaw; and in the remake, she is played by Mia Farrow. She is really a demon sent from Hell, to watch over the Antichrist

Bringing a dog with her, she comes to the Thorn household, as Damien's new nanny - after the previous one hangs herself. When Katherine (Damien's adoptive mother) falls pregnant, Damien starts becoming jealous - and Mrs. Baylock stands back and callously watches, as Damien runs her off a balcony with his tricycle.

After Katherine and Robert (Damien's adoptive father) discover that their own child was murdered, so that Damien would be placed in their care (Mrs. Baylock herself most likely having had a hand in that child's murder somewhere along the line), they soon become convinced that their adoptive son is the Antichrist - and Mrs. Baylock later appears to Katherine in the night and kills her, by throwing her from a window.

When Robert has no choice but to kill Damien, he later returns to England - in order to do so. But, Mrs. Baylock suddenly attacks him before he can - and shouts to Damien to run away. After a struggle between Robert and Mrs. Baylock through the house, he killls her - by stabbing her in the neck, with a carving fork.

That was how she died in the original film: in the remake, with Robert dragging Damien out to his car, Mrs. Baylock persues them - and Robert kills her, by running her over with his car.