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Part One |
| 1 | Sophia | Davies | Alice and Tom's daughter. |
| | Olivia | Davies | Nathan and Alice's daughter. Aka: Livvy. |
| | Ms. | Watts | Olivia's teacher. |
| | Phoebe | | Olivia's classmate. |
| | Kendall | | Olivia's classmate. |
| | Nathan | Davies | Olivia and Sophie's father. Alice's husband. |
| | Millie | | Beth's daughter. |
| 2 | Lottie | | A junior designer. Alice's employee. |
| | Matt | | Alice's workmate. |
| | Thomas | Evans | Sophia's father. Alice's first husband. |
| 3 | David | Phillips | Alice's ex-lover. |
| | Carole | | The school secretary. |
| 4 | Tracy | | Alice's ring leader. |
| | Maxine | Elliot | Alice's former classmate. |
| 7 | Hannah | | Sophia's friend. |
| | Sylvia | | The woman at Cheated Wife's internet page. |
| | Paul | | Sylvia's cheating husband. |
| 8 | Rachel | | The woman on the letter. |
| | Megan | | Sophia's friend. |
| 9 | Monica | | Beth and Alice's spiritual guru. |
| | Eileen | | The visiting staff. |
| 12 | Gina | Fellowes | Alice's acquaintance. |
| | Michelle | Truman | The wife of Alice's 2nd cousin's son. |
| | Jack | Stokes | Alice's acquaintance. |
| | Lindsay | Brindley | One of the mothers in Sophia's class. |
| | Leo | | Jules's husband. Tom's friend. |
| | Jules | | Leo's wife. |
| | Daniel | Evans | Tom's brother. |
| | Mark | Edwards | The man at the car company. |
| | | |
Part Two |
| 14 | Maria | | Beth's friend. |
| | Mrs. | Pullman | Beth's teacher. |
| | Bertie | | Beth's student. |
| | Jacob | | Beth's student. |
| | Tyson | | Beth's dog. |
| 15 | Jimmy | | Maria's husband. |
| | Joel | | Beth's live-in partner. |
| 16 | Diego | Rodriguez | Tom's client. |
| 17 | Antonio | | The head chef. |
| 19 | Father | Michael | The priest. |
| 21 | Elise | | The receptionist. |
| | Frank | Evans | Tom's father. |
| | Sheila | | Tom's aunt. |
| | Joyce | Evans | Tom's mother. |
| | Maude | | Joyce's neighbor. |
| 22 | Seamus | Harrison | Tom's biggest client. |
| 28 | Ben | Forrester | Joyce's real son. |
| | | |
Part Three |
| | Mr. | Yahamoto | Nathan's Japanese client. |
| 33 | Mr. | Anthony | The man that Alice met at the bar. |
| 35 | Linda | | Alice's mother. |
| 38 | Josh | | Nathan's old friend. |
| | Liz | | Alice's solicitor. |
