A traumatic head injury leaves Sophie with extreme memory loss. In her quest to put the pieces of her life back together—with help from her husband and friends—Sophie begins to question the truth behind her picture-perfect life.
| Actor | Role |
|---|---|
 Gugu Mbatha-RawTess Caldwell / Sophie Ellis | Tess Caldwell / Sophie Ellis |
 Oliver Jackson-CohenJames Ellis | James Ellis |
 Millie BradyEliza Huntley | Eliza Huntley |
 Phil DunsterQuinn Huntley | Quinn Huntley |
 Gavin DreaCallum Walsh | Callum Walsh |
 Freida PintoGrace Daaveed | Grace Daaveed |
 Rupert GravesHenry Huntley | Henry Huntley |
 Joely RichardsonOlivia Huntley | Olivia Huntley |
 Tara FitzgeraldAnne Huntley | Anne Huntley |
 Nina SosanyaJulia | Julia |