| Dr. |
Anderson | Oncologist |
| Jennifer |
Bennington | Receptionist at the elementary school |
| Jason |
Bourne | Fictional character referenced in dialogue |
| Dr. |
Branson | Orthopedic doctor |
| Charlie |
Brown | Cartoon character |
| Charlie |
Chaplin | Comic actor and filmmaker |
| Maggie |
Cooper | Drake's mother |
| Jeff |
Danbury | Ella's ex-husband |
| Captain |
Donahue | Commanding officer of the special operations unit |
| Mrs. |
Dupreveny | Beckett's acquaintance |
| Larry |
Fischer | Groundskeeper at Solitude |
| Doctor |
Franklin | Pediatrician |
| Beckett |
Gentry | Special Ops soldier. Aka: Chaos |
| Mark |
Gutierrez | Telluride family lawyer |
| Mr. |
Halsen | School principal |
| Mr. |
Henderson | Guest at the bed and breakfast |
| Ron |
Howard | American filmmaker and actor |
| Dr. |
Hughes | Pediatric oncologist at Denver Children's Hospital |
| Mr. |
Jonas | District superintendent |
| Colton |
MacKenzie | Five-year-old son. Aka: Colt |
| Ella Suzanne |
MacKenzie | Twenty-five-year-old single mother of twins |
| Margaret |
MacKenzie | Five-year-old daughter diagnosed with cancer. Aka: Maisie |
| Ryan |
MacKenzie | Beckett's best friend; Ella's brother; deceased. Aka: Mac |
| Ms. |
May | Teacher of Maisie and Colt |
| Bret |
Michaels | American musician |
| Dr. |
Peterson | One of Maisie's doctors |
| Chris |
Pratt | American actor and film producer |
| Cassandra |
Ramirez | Danielle's sister. Aka: Cassie |
| Mrs. |
Rivera | Teacher of Colt and Maisie |
| David |
Robins | Firefighter |
| Norman |
Rockwell | American painter and illustrator |
| Ms. |
Steen | Maisie's teacher |
| Doctor |
Taylor | One of Maisie's doctors |
| John Ronald Reuel |
Tolkien | English writer and philologist |
| Conner |
Williamson | Hailey's friend |
| Danielle |
Wilson | Insurance agent reviewing medical claims |
| Ada |
| Matriarch of Solitude; truth-teller |
| Annie |
| Ella's acquaintance |
| Blake |
| Jeff's brother |
| Bobby |
| Colt's classmate |
| Brandon |
| Maisie's baby brother |
| Doc |
| Nickname for the unit's medic |
| Drake |
| Colt's classmate |
| Emma |
| Colt's classmate |
| Hailey |
| Ella's closest friend |
| Havoc |
| Beckett's loyal dog |
| Iverson |
| Judge |
| Jenkins |
| Resident medic |
| Laura |
| Colt's classmate |
| Luke |
| Hailey's acquaintance |
| Patty |
| Jeff's mother |
| Pearl Jam |
| American rock band |
| Ramirez |
| Member of the same military unit as Ryan and Beckett |
| Rich |
| Patty's husband |
| Roman |
| Nurse at the elementary school |
| Rory |
| Maisie's younger sister |
| Solitude |
| Name of Ella's bed and breakfast in Telluride, Colorado |
| Stella |
| Beckett's acquaintance |
| Tess |
| Gutierrez's wife |
| Williams |
| Beckett's acquaintance |
