Constance Langdon, played by actress Jessica Lange, lives next door to the “murder house” and is an aggressively sassy woman who moved to LA from Virginia long ago to try to make it as an actress but saw her dreams dashed when she turned down roles because they required nudity. Constance acts friendly but has a definite cruel streak that is evident in her treatment of Adelaide, her daughter who suffers from Down syndrome and her attempt to poison Violet with ipecac-laced cupcakes.

Constance knows a lot more than she’s telling as we all saw that she actually killed Moira back in the 80s when she caught her having an affair with her husband, Hugo. She still holds a grudge over Moira, who we saw as being an unwilling participant in the “affair,” and taunts her whenever she can. It was also revealed that Constance is Tate’s mother, which makes the disturbed Tate Constance’s secondly ghost connection to the house.

After her daughter Adelaide is killed on Halloween night, the victim of a hit and run, Constance felt regret and remorse over the loss and put make-up on Addy’s face at the morgue so that she could be “pretty.”

Sometime in 1994, Constance was having an affair with next-door neighbor Larry Harvey, and asked him to kill another of her deformed children, Beau, who was chained up in the attic of the Murder House. Larry did so, and Beau's ghost haunts the domicile like so many others.

Constance had an affair with Larry back in 1994, which caused Larry's wife to burn herself and their two daughters alive in the house, which was presumed to be the cause of Larry's burns. On the day of the Westfield High shooting, Tate made one quick stop at the bank Larry had been working at, covered him in gasoline, and burnt him alive.

Constance, with the aid of Larry and Moira, killed off Joe Eskandarian when she learned that he wanted to buy the Harmon's house and tear it down. Constance feared that if the house was torn down, she'd lose her family.

Constance also lost another love in her life, Travis, to Hayden, and while she was the prime suspect, Larry took the fall in hopes that it would redeem his sins.