| Pro | Owen | Michaels | Hannah's husband. |
| | Hannah | Hall | Protagonist and Narrator. |
| | | | Part 1 |
| | Bailey | Michaels | Owen's daughter. Hannah's step-daughter. |
| | Claire | | A friend of the 12-year-old girl. |
| | Jack | Hall | Hannah's father. |
| | Carole | Hall | Hannah's mother. |
| | Gwendolyn | | Jack's assistant and mistress. |
| | Avett | Thompson | The CEO of the tech firm. Hannah's client. |
| | Belle | Thompson | Avett's wife. |
| | Suz | | Bailey's friend. |
| | Bobby | | Bailey's boyfriend. |
| | Lynn | Williams | Bailey's acquaintance. |
| | Mr. | Hahn | Hannah's neighbor. |
| | Mrs. | Hahn | Mr. Hahn's wife. |
| | Julia Alexandra | Nichols | Hannah's oldest friend. Aka: Jules. |
| | Nash | Richards | Hannah's ex-boyfriend. |
| | Max | | An investigative journalist at Chronicles. |
| | Grady | Bradford | A U.S. Marshal. |
| | Benj | | A waiter. |
| | Thomas | Shelton | A family lawyer. Grady's friend. |
| | Carl | Conrad | Owen's closest friend. A lawyer. |
| | Patricia | Conrad | Carl's wife. Aka: Patty. |
| | Sarah | Conrad | Carl and Patty's daughter. |
| | LeAnn | Sullivan | Hannah's neighbor. |
| | Olivia | Michaels | Bailey's mother. Owen's first wife. |
| | L.Paul | | Owen's conservator. |
| | Jeremy | O'Mackey | An FBI special agent. |
| | Naomi | Wu | Jeremy's colleague. |
| | Jake | Bradley-Anderson | Hannah's former fiancé. |
| | Brian | Padura | The boy who asked Bailey if Owen is a criminal. |
| | | | Part 2 |
| | Amy | | A hotel receptionist. |
| | Steve | | A desk clerk. |
| | Elliott | | A tour guide. |
| | Elenor | H. McGovern | The receptionist at Episcopal Church. |
| | Cara | | Carl's co-worker and mistress. |
| | Alex | | Jake's friend. |
| | Waylon | | The man Owen and Hannah met. |
| | Tobias | Cookman | Owen's professor. Aka: Cook. |
| | Nielon | Simonson | The school registrar. |
| | Cheryl | | The graduate student. Cook's assistant. |
| | Scott | | Cook's assistant. |
| | Rory | | Bailey's friend. |
| | Jordan | Maverick | The COO at The Shop. Avery's assistant. |
| | Max | | Jules's colleague. |
| | Sophie | | A long-time parishioner. |
| | Katherine | Smith | Owen's former classmate. Aka: Kate. |
| | Charlie | Smith | Andrea's husband. Kate's brother. |
| | Andrea | Reyes | Charlie's wife. |
| | Meredith | Smith | Charlie and Kate's mother. |
| | Daniel Nicholas | Bell | Charlie and Kate's father. Aka: The good lawyer. |
| | Ethan | Young | Kate's husband. Owen's real name. |
| | Kristin | | Etan and Kate's daughter. Bailey's real name. |
| | | | Part 3 |
| | Sylvia | Hernandez | A U.S. Marshal. Grady's colleague. |
| | Ned | | Nicholas's guard. |
| | Casper | | Nicholas's dog. |
| | Leon | | Nicholas's dog. |
| | Marcus | | One of Nicholas's guards. |
| | Harris | Gray | Nicholas's former client. |
