Toby's ex-wife and a successful talent agency founder, whose sudden absence creates a tumultuous period for her family, challenging her determination to balance work and family life.

Toby and Rachel’s 11-year-old daughter, who struggles with her mother's disappearance and the impact of her parents' divorce, leading to acting out in risky ways.

The 9-year-old son of Toby and Rachel, who is sweet and supportive to his father, handling the familial changes more quietly than his sister.

A college friend of Toby, a former journalist who narrates the story while reflecting on the complexities of adult friendships, marriage, and parenthood.

Toby's college friend, a bachelor known for his charm, who experiences a shift in his priorities as he plans to settle down with his love interest, Vanessa.

Rachel's romantic interest, a wealthy and superficial man who provides a glimpse into a lavish lifestyle that Rachel is drawn to but struggles with.

Toby's primary romantic interest from a dating app, a married woman planning to separate, whose interactions with Toby reveal the dissonance between fantasy and reality.

A friend of Rachel’s and mother of one of Hannah’s friends, representing the wealthy social circle that Rachel aspires to join.

Sam’s wealthy and influential wife, whose social standing Rachel seeks to penetrate before her involvement with Sam.

A curious and intelligent hospital fellow much younger than Toby, who becomes the object of his romantic interest but ultimately turns him down.

A patient of Toby's with a rare liver disease, whose care becomes complicated by Toby's personal life, highlighting his professional and personal conflicts.