A Philadelphia couple are in mourning after an unspeakable tragedy creates a rift in their marriage and opens the door for a mysterious force to enter their home.
Leanne, a young nanny, is hired to care for baby Jericho. But all is not as it seems.
As Leanne settles in, Sean worries that Dorothy and Jericho are not in good hands.
Sean enlists Dorothy's brother, Julian, to monitor her relationship with Leanne.
Leanne disobeys an order and discovers why Sean is so protective of baby Jericho.
With Dorothy and Sean gone for the day, Leanne makes a new friend.
Leanne's strange uncle arrives unexpectedly. Dorothy fights to keep her nanny.
Dorothy throws a tense dinner party. Sean entrusts Leanne to help keep a secret.
Julian is forced to relive a dark memory during a night of babysitting.
Leanne acts out at Dorothy after learning the truth about baby Jericho.
After Jericho's baptism, uninvited guests force difficult decisions.
Jericho and Leanne are missing. Dorothy devises a 72-hour game plan, while Sean and Julian continue hiding the truth.
With Natalie's help, Sean and Julian uncover disturbing details about the cult. Dorothy sacrifices her career reputation for her family.
The Turners open up a family business as a front for a more important mission.
With a new guest in the house, Dorothy resorts to bold tactics to get what she wants.
The Turners scramble to prepare for a pivotal meeting. Leanne bakes a mysterious cake.
An unexpected visitor pushes everyone to their limits as Sean re-examines his past and Dorothy attempts to negotiate a delicate exchange.
The Marino family tragedy raises more questions about Leanne. Uncle George's presence in the house creates a problem for the Turners.
Dorothy and Sean get a hopeful sign. Leanne and Julian get to know each other better.
As they wait for Jericho's return, Dorothy and Sean pretend everything is fine at a tense Christmas Eve lunch.
An unexpected arrival threatens to tear Dorothy and Sean apart, leaving Leanne defenseless.
Three months after the attack, the Turners head down the shore. Left alone, Leanne has a more exciting day than she anticipated.
Dorothy hosts a mommy-and-me group, but Leanne finds that she can't trust strangers.
Julian digs for the truth about Jericho. New visitors at the local park worry Leanne.
Leanne continues to be upset by other people. Bad luck strikes the Turner brownstone.
The Turners attend a block party on Spruce Street. Leanne finally feels comfortable outside of the house, but she finds herself in danger.
Sean's dinner party goes south when Leanne is rude to a guest. Dorothy uncovers frightening details from the block party.
Dorothy works with Veera to get Leanne out of the house, but Jericho and Leanne are more connected than they know.
Isabelle threatens to uncover Dorothy's past.
Dorothy and Frank hatch a plan to get Leanne out of the Turner household for good.
Season finale. Dorothy makes a desperate final plan.
The war between Leanne and the Church of the Lesser Saints reaches its peak.
Leanne begins to torment Dorothy as chaos overtakes Spruce Street.
Dorothy hires two live-in nurses to help speed up her recovery—and protect her from Leanne.
Sean sees Leanne's true colors while she hunts her enemies on Halloween.
Sean and Dorothy host the new neighbors on Spruce with plans to finally get Leanne out of the house.
The birthday party from hell ensues when the cult makes its boldest move yet with Leanne.
Dorothy discovers a connection with Leanne. Uncle George shares information with the Turners.
Sean and Julian make a decision about Leanne.
Sean and Julian open up about a secret.
Series finale. As the world crumbles, can anyone stop Leanne?
