| Robert |
Autain | Infamous serial killer. Aka: Abbaitor; The Blue-Eyed Butcher |
| Gabriela |
Bautista | Oliver's nanny |
| Gloria |
Bergson | Adam's mistress |
| Oliver |
Bergson | Son of Gloria and Adam |
| Ruth |
Bergson | Gloria's mother |
| Samantha |
Chang | Chloe's interviewer |
| Chloe |
Cooper | Protagonist |
| Raven |
Cooper | Chloe's mother |
| Kathleen |
Fairlie | Crime reporter |
| Greg |
Ford | Jemma's lawyer |
| Noah |
Gautier | Criminal profiler |
| Maeve |
Havers | Retired detective |
| Mr. |
Higgins | Character mentioned |
| Edward |
Hopper | American painter |
| Sophia |
Mancini | Dance teacher; Jemma's former friend |
| Steven |
Mancini | Sophia's husband |
| Sakura |
Oba | Chloe's co-worker |
| Axel |
Pederson | Maeve's partner |
| Mike |
Richards | Witness |
| Gio |
Rossi | Scott's co-producer |
| Trinity |
Scott | Producer of It's Criminal |
| Jennie |
Smith | One of Autain's victims |
| Adam |
Spengler | Jemma's husband; surgeon |
| Hailey |
Spengler | Daughter of Jemma and Adam |
| Jackson |
Spengler | Son of Jemma and Adam |
| Jemma |
Spengler | The swimmer; Chloe's neighbor |
| Amy |
Tey | Vancouver Morning Show host |
| Babette |
Tigran | Narek's wife |
| Narek |
Tigran | Adam's former friend |
| George |
Vasilou | Barber; Chloe's neighbor |
| Stavros |
Vasilou | Bartender; George's nephew |
| Marianne |
Wade | Victim; famous Ironman triathlete |
| Bill |
Zeigler | Owner of Beach House Restaurant and Bar; Chloe's boss |
| Annique |
| One of Jemma's friends |
| Bettina |
| Chloe's co-worker |
| Boo |
| Jemma's dog |
| Brodie |
| Chloe's dog |
| Charlene |
| Podcaster |
| Dot |
| Social media influencer; Jemma's friend |
| Natalie |
| Dot's lifestyle coach |
| Sharie |
| Narek's mistress |
| Sweetie |
| Jemma's dog |
| Zoe |
| Character mentioned |
| Zoe |
| Daughter of Autain and Jennie |
