is the fourth episode of American Horror Story: Murder House , which first aired on October 26, 2011 . This pivotal chapter blurs the line between the living and the dead as the ghosts of the Murder House gain the ability to leave the grounds or manifest more strongly on Halloween night. Key Plot Developments

A nurse at the hospital faints after performing an ultrasound on Vivien, hinting that her eight-week-old baby is developing at an unnatural rate.

Larry Harvey continues to blackmail Ben for $1,000 to keep the secret of Hayden’s death . By the end of the episode, the ghost of a bloodied Hayden appears at the Harmons' front door.

Zachary Quinto as Chad Warwick and Teddy Sears as Patrick. "American Horror Story" Halloween: Part 1 (TV Episode 2011)

To make the house more sellable, real estate agent Marcy introduces Ben and Vivien to Chad and Patrick , a gay couple and former owners who were murdered in the house in 2010. Unbeknownst to the Harmons, these "designers" are actually spirits.

American Horror Story 1x4 -

is the fourth episode of American Horror Story: Murder House , which first aired on October 26, 2011 . This pivotal chapter blurs the line between the living and the dead as the ghosts of the Murder House gain the ability to leave the grounds or manifest more strongly on Halloween night. Key Plot Developments

A nurse at the hospital faints after performing an ultrasound on Vivien, hinting that her eight-week-old baby is developing at an unnatural rate. American Horror Story 1x4

Larry Harvey continues to blackmail Ben for $1,000 to keep the secret of Hayden’s death . By the end of the episode, the ghost of a bloodied Hayden appears at the Harmons' front door. is the fourth episode of American Horror Story:

Zachary Quinto as Chad Warwick and Teddy Sears as Patrick. "American Horror Story" Halloween: Part 1 (TV Episode 2011) Larry Harvey continues to blackmail Ben for $1,000

To make the house more sellable, real estate agent Marcy introduces Ben and Vivien to Chad and Patrick , a gay couple and former owners who were murdered in the house in 2010. Unbeknownst to the Harmons, these "designers" are actually spirits.