Ep 4. Halloween, Part 1

On the fourth episode of American Horror Story's first season, entitled "Halloween, Part 1," the Harmons receive their first visitors since moving into the notorious murder house in Los Angeles. As the residents of the house prepare for Halloween, a group of teenagers dressed as the infamous Black Dahlia murderer come to the house looking for a scare.

Meanwhile, Vivien (Connie Britton) struggles to deal with her pregnancy and the betrayal of her unfaithful husband, Ben (Dylan McDermott). As she spends more and more time alone in the house, strange occurrences continue to happen around her, including visions of the previous owners' stillborn child.

The episode also explores the backstory of the murder house's previous inhabitants, including Nurse Elizabeth Short (Mena Suvari), who was murdered by a former patient, and a man named Larry Harvey (Denis O'Hare), who is revealed to have a connection to the house and the Harmon family.

As Halloween night approaches and tensions in the house rise, the spirits of the murdered come out to play and threaten the safety of the Harmons and their guests. The episode ends on a cliffhanger, leaving viewers eager to see what happens next on Halloween night in the murder house.

Overall, "Halloween, Part 1" is a gripping episode filled with suspense and intrigue as the characters face their first major threat since moving into the haunted house. The episode explores the themes of betrayal and revenge while further developing the characters' backstories and motivations. It sets the stage for the highly anticipated second half of the Halloween two-parter and keeps viewers on the edge of their seats.