Masters of Horror: Season 1, Episode 2

1 - 2: Dreams in the Witch House

Walter Gilman, a college student rents a loft in a building in the New England town of Arkham. While studying interdimensional string theory at college he is haunted by nightmares of a 17th century witch and her rat with a human face. He must prevent the death of his neighbor's baby at the hands of these forces while it's possible he could become the murderer himself.