| Bethany | Atlas | Fred's wife. |
| Fred | Atlas | One of Arlo and Gertie's neighbors. |
| John | Barry | British composer and conductor of film music. |
| Peter | Benchleys | A War Veteran. One of Arlo and Gertie's neighbors. |
| Don | Bianchi | One of a detectives. |
| Aileen | Bloom | A second-year PhD student. |
| Ruby | Bridges | American civil rights activist. |
| Billie | Eilish | American singer-songwriter. |
| Eileen | Fisher | American fashion designer and entrepreneur. |
| Adam | Harrison | Dave's elder brother. |
| Dave | Harrison | Jane Harrison's son. |
| Jane | Harrison | A pre-school teacher. One of Arlo and Gertie's neighbors. |
| Tim | Harrison | Dave's father. |
| Oscar | Heep | Head office manager for Bankers Collective. |
| Bernard | Herrmann | American composer and conductor. |
| Cat | Hestia | One of Arlo and Gertie's neighbors. |
| Helen | Hestia | Rich and Cat's daughter. |
| Lainee | Hestia | Cat Hestia's daughter. |
| Rich | Hestia | Cat's husband. |
| Denise | Hudson | One of a detectives. |
| Michelle | Kaur | One of Sai and Nikita's children. |
| Nikita | Kaur | Sai's wife. |
| Pranav | Kaur | One of Sai and Nikita's children. |
| Elsa | Lanchester | British-American actress. |
| Danny | Lasson | Arlo's friend. |
| Brooke | Leonardis | One of Julia's acquaintances. |
| Ms. | Lopez | Julia's teacher. |
| Debra | Lucano | One of Rhea's students. |
| Cheerie | Maupin | Gertie's stepmother. |
| Tom | Mijares | One of Rhea's students. |
| Sienna | Muller | One of Julia's acquaintances. |
| Dominick | Ottomanelli | One of Arlo and Gertie's neighbors. aka: Dom. |
| Linda | Ottomanelli | Dominick's wife. |
| Mark | Ottomanelli | One of Dom and Linda's sons. |
| Michael | Ottomanelli | One of Dom and Linda's sons. |
| Jill | Pontis | Steven's wife. |
| Marco | Pontis | One of Steven and Jill's sons. |
| Richard | Pontis | One of Steven and Jill's sons. |
| Steven | Pontis | One of Arlo and Gertie's neighbors. aka: Steve. |
| Bertrand | Russell | British philosopher and polymath. |
| Miguel | Santos | One of Rhea's students. |
| Fred | Savage | American actor and director. |
| Fritz | Schroeder | Rhea's husband. |
| Rhea | Schroeder | A college professor. Gertie's friend. |
| Shelly | Schroeder | Rhea's daughter. |
| William | Shakespeare | English playwright, poet and actor. |
| Jessica | Sherman | A 13 year-old girl Rhea knocked unconscious at a cafe in Seattle. |
| Sai | Singh | One of Arlo and Gertie's neighbors. |
| Sam | Singh | Sai and Nikita's son. |
| Nick | Sloss | A criminal attorney. |
| Charlie | Walsh | Margie and Sally's son. |
| Margie | Walsh | One of Arlo and Gertie's neighbors. |
| Sally | Walsh | Margie's wife. |
| Arlo | Wilde | A former lead guitarist. |
| Gertie | Wilde | A former beauty queen. Arlo Wilde's wife. aka: Gert. |
| Julia | Wilde | Gertie and Arlo's daughter. aka: Jules. |
| Larry | Wilde | Gertie Wilde's son. |
| Allen | | The chair of the English department. |
| Ella | | One of Rhea's daughters. |
| Fluffy | | A cat. |
| Fritz Jr. | | Rhea's son. aka: FJ. |
| Gennet | | One of a detectives. |
| Gretchen | | One of Rhea's daughters. |
| MaryJane | | Allen's wife. |
| Nirvana | | Rock band. |
| Oscar | | Arlo's new acquaintance. |
| Ralph | | Fred and Bethany's dog. |
