A wealthy man caught between his love for his wife and another woman, characterized by his need for control and his tendency to prioritize his own happiness.

A novelist with a practical demeanor, deeply in love with her husband Archie, and a character marked by her growth in independence and self-awareness following personal betrayal.

An Irish man once full of dreams and positivity, who loves Nan deeply and serves as a moral and emotional contrast to Archie.

A retired police inspector with a kind heart and a complex moral compass, who gets involved in the investigation of Agatha Christie's disappearance and forms a bond with her.

A woman who befriends Nan at a convent, dealing with profound personal loss, and whose story arc involves overcoming trauma to find a happier life.

A former nun with a trusting demeanor who later becomes a social figure, known for her desire to be loved and her pivotal role in the unfolding events.