Samira moves her family into a 1970s smart home. Her curiosity turns into suspicion when her son reactivates the house's long-dormant AI assistant.

Fynn goes looking for Steve. Tensions reach a boiling point during Juno's playdate. In 1964, a medical experiment takes a terrible turn.

With Samira out of the house, Cassandra takes her family hostage. In 1972, Cassandra adapts to her new living circumstances.

Convinced that her family is in danger, Samira attempts to return home. Meanwhile, Cassandra asserts full control over the house.

Cassandra begins to turn Samira's family against her. Fynn takes an interest in a classmate. In 1971, a woman suspects her husband of infidelity.

Feeling isolated, Samira tries to convince David of Cassandra's intentions. In 1971, a mother goes to extreme lengths to protect her son.