Andy is a 31-year-old night shift police dispatcher living in the apartment above her mother's garage in Belle Isle, Georgia. She moved home from New York three years ago to care for her sick mother. Initially aimless, she is shaken when her mother responds to a public shooting with violent efficiency. This shocking event propels Andy out of her passive routine as she attempts to uncover the truth about her family's history.

A 55-year-old speech pathologist in Belle Isle, Georgia, she presents herself as a polished, conventional, and deeply organized woman. Her calm and lethal response to a mass shooter exposes a fiercely protective nature and hidden combat skills. In the 1986 timeline, she is a talented pianist connected to a powerful family and a radical domestic activist group.

The highly manipulative leader of the Army of the Changing World, a radical domestic activist group operating in the 1980s. Older than his girlfriend by three years, he uses his overwhelming charm and good looks to draw vulnerable young people into his orbit. He relies on psychological control and violent tests of loyalty to maintain absolute authority over his followers.

In 2018, she is a professor at the University of Texas who spent twenty years in prison. In the 1980s timeline, operating under the code name "Penny," she acts as an intensely devoted member of the Army of the Changing World. Her rigid, minimalist lifestyle in the present day reflects an enduring fixation on her former group's leader.

Jane's older brother and a central figure in the 1986 timeline. He struggles heavily with depression until he finds a driving cause through his best friend's activist group. He commits himself to exposing the corruption within his father's healthcare business, even as his physical health rapidly fails due to the AIDS virus.

Laura's ex-husband and Andy's stepfather. As a lawyer, he is highly practical, stepping in to shield both women from aggressive police questioning after the diner shooting. Despite being divorced from Laura for years, he remains a reliable presence in their lives.

An 18-year-old from a prominent law enforcement family whose violent actions at the Belle Isle diner set the story in motion. His attempt to orchestrate his own death by police fire goes awry when he targets a police dispatcher and encounters her fiercely protective mother instead.

A detective investigating the mass shooting at the Belle Isle diner. She utilizes aggressive interrogation tactics and tries to build a rapport with Andy to uncover the truth behind Laura's unusually lethal self-defense response.

A mysterious man who repeatedly crosses paths with Andy during her flight from Belle Isle. Charming but suspect, he tracks her movements across state lines, forcing her to question his motives as she travels deeper into unknown territory.

The controlling patriarch of the Queller family and founder of Queller Healthcare. His controversial economic theories and abusive treatment of his children make him a major target for radical activist groups in the 1980s.

The eldest Queller sibling. He is deeply involved in his father's corporate empire and is implicated in financial fraud concerning Queller Healthcare's group homes. This corruption becomes a key leverage point for the activist group.

A woman devastated by personal tragedy resulting from Queller Healthcare's policies. She infiltrates the 1986 Oslo conference while impersonating Dr. Alex Maplecroft to make a violent public statement against Martin Queller.

A former famous ballet dancer whose career ended due to a knee injury. She operates a farmhouse in Illinois with her husband, which serves as a safe house for the Army of the Changing World in 1986, and later becomes a key destination for Andy's investigation.

Clara's husband and a lawyer who assists the Army of the Changing World. He lives quietly with his wife on an Illinois farmhouse, acting as a crucial legal and logistical resource for the radicals in 1986.

A violent intruder who breaks into Laura's house to confront her shortly after she is released from the hospital. His aggressive interrogation about Paula Kunde inadvertently sparks Andy's cross-country journey.