1 | | | Falling House |
| Willa | Knox | A journalist. |
| | Pertofaccio | A contractor. |
| Captain | Landis | A real estate developer. |
| Iano | Tavoularis | Willa's husband. |
| Antigone | | Willa's daughter. Aka: Tig, Antsy. |
| Zeke | | Willa's son. |
| Dixie | | A dog. |
| Nick | Tavoularis | Iano's father. |
| Helene | | Zeke's live-in-partner. |
| Aldus 1 | | Zeke's son. Aka: Dusty. |
| Aldus 2 | | Helene's father. |
| Michael | | Zeke's friend. |
| Sharon | | Michael's wife. |
| Jake | | Zeke's friend. |
2 | | | Beginners |
| Thatcher | Greenwood | A science teacher. |
| Rose | | Thatcher's wife. |
| Joseph | Treat | An assistant to medical men during the war. |
| Mary | Treat | One of the best known woman scientist. |
| Polly | | Rose's sister. |
| Pardon | Crandall | Thatcher's acquaintance. |
| Dr. | Garvin | An orthopedic surgeon. |
| Ulysses | Grant | 18th U.S. President. |
| Professor | Cutler | Thatcher's employer. |
| Gracie | | A maid. |
| Mrs. | Brindle | A cook. |
| Mrs. | Marberry | Thatcher's acquaintance. |
| Aurelia | | Rose's mother. |
| Fred | | Thatcher's uncle. |
3 | | | Investigators |
| Grandma | Knox | Willa's grandmother. |
| Etsy | | One of Willa's acquaintances. |
| Pinterest | | One of Willa's acquaintances. |
| Jorge | | Tig's friend. |
| Jose Luis | | Jorge's brother. |
| Dreama | | Tig's aunt. |
| Roula | | Nick's wife. |
4 | | | Scylla and Charybdis |
| Charybdis | | One of Polly's dogs. |
| Scylla | | One of Polly's dogs. |
| Mr. | Nailbourne | A music teacher. |
| Selma | | Mary Treat's assistant. |
| Charles | Darwin | One of Mary Treat's friends. |
| Asa | Gray | One of Mary Treat's friends. |
5 | | | Striking Out |
| Athena | | One of Iano's sisters. |
| Lita | | One of Iano's sisters. |
| Irini | | One of Iano's sisters. |
| Darcie | | Dreama's twin sister. |
| Dr. | Saberwal | Nick's doctor. |
| Mr. | Stevens | Willa's acquaintance. |
| Kendra | | One of Iano's acquaintances. |
| Gino | | One of Iano's acquaintances. |
6 | | | Strange Companions |
| Reverend | Pittinger | A priest. |
| Mary | Tillotson | One who promotes the Dress Reform Convention. |
| Mrs. Merton | Stevens | Mary Tillotson's friend. |
| Mrs. | Landis | Captain Landis' wife. |
| Uri | Carruth | A newspaperman. |
| Charles | Campbell | A town historian. |
| Mrs. | Clark | A designer. |
| Mr. | Martini | A building contractor. |
| Willis | Chester | One of Thatcher's pupils. |
| Giovanna | Persichetti | One of Thatcher's pupils. |
| Joseph | Priestley | A great scientist. |
| Daniel | Bernoulli | A mathematician. |
| Dr. | Joule | Calculated velocity of particles inside cloud of hydrogen gas. |
| Phoebe | | Charles Campbell's wife. |
| Tennyson | | A poet. |
| Charles V. | Riley | An entomologist. |
7 | | | The Cake |
| Christopher | Hawk | Willa's acquaintance. |
| William | Dagget | An inventor. |
| Thomas | Welch | Inventor of unfermented grape juice. |
| Susan | Pearson | A historian. |
| Victoria | Woodhull | A historian. |
| Bob | | Iano's uncle. |
8 | | | Shelter In Place |
| Mr. | Fogget | Mary Treat's friend. |
| Thoreau | | An essayist. |
| Gay-Lussac | | A chemist. |
| Professor | Watson | Lead research team addressing gastro-esophageal reflux. |
| Troy | | One of Joseph Treat's acquaintances. |
| Mr. | Newcomb | One of Joseph Treat's acquaintances. |
| Mrs. | Newcomb | Mr. Newcomb's wife. |
| Thomas | Browne | An English author. |
| Charles | Lyell | A geologist. |
| Mr. | Agassuz | Mary Treat's acquaintance. |
| Tom | Thumb | A circus performer. |
9 | | | The Front Of The Line |
| Gwendolyn | | One of Iano's students. Aka: Gwen |
| Clara | Petrofaccio | A social worker. |
| Merrill | Lynch | A financial advisor. |
| Virginia | Woolf | A writer. |
| Beyonce | | American singer-songwriter. |
| Delyse | | One of the nurses. |
10 | | | Gift Of The Magi |
| Professor | Bowman | Cutler's old friend. |
| | Vermeer | A painter. |
| Phineas | Barnum | American showman. |
| Louise | Dunwiddie | A dance instructor. |
| Miss | Hirtsberger | French language teacher. |
| Joseph | Lister | A British surgeon. |
| Louie | Pasture | A French biologist. |
| Francesco | Redi | One of the great innovators.. |
| Ptolemy | | A mathematician. |
| Avicenna | | A Persian polymath. |
| Nicolaus | Copernicus | A mathematician. |
| Johannes | Kepler | An astronomer. |
| Robert | Boyle | A philosopher. |
| Galileo | Galilei | An
astronomer. |
| Antoine | Lavoisier | A French chemist. |
| Amedeo | Avogadro | An Italian scientist. |
| Isaac | Newton | A mathematician. |
| Antonie van | Leeuwenhoek | A Dutch scientist. |
11 | | | Revelations |
| Sondra | | One of Jorge's sisters. |
| Lara | | One og Jorge's sisters. |
| Dr. | Patel | Dusty's doctor. |
| Aristoteles | | Tig's ex-boyfriend. Aka: Toto. |
| Cervantes | Garcia | A bakery owner. |
| Thalia | | One of Cervantes' daughters. |
| Erato | | One of Cervantes' daughters. |
| Terpsichore | | One of Cervantes' daughters. |
| Lucia | | Toto's wife. |
| Lorenzo | | Toto's father. |
| Natalia | | Toto's mother. |
| Yari | | Tig's friend. |
12 | | | Treasure Chest Of Time |
| Johann | Miescher | A Swiss biologist. |
| Samuel | Wilberforce | A bishop. |
| Marvel | | Rose's acquaintance. |
| Leverett | | Louise's brother. |
| Orville | Dunwiddie | Louise's widowed father. |
| Mrs. | Persichette | Giovanna's mother. |
| Mary | Anning | An English paleontologist. |
13 | | | Mr. Occam's Razor |
| Orson | Willis | American author. |
| Dr. | Seuss | American author. |
| Keith | Jarrett | American jazz pianist. |
| Jane | | A nurse. |
| Jemima | | Tigs aunt. |
14 | | | End of Days |
| Mr. | Goby | A janitor. |
| Hank | Wilbur | One of Thatcher's acquaintances. |
| Frank | Ladd | One of Thatcher's acquaintances. |
| Mrs. | Carruth | Uri Carruth's wife. |
15 | | | Unexpected Reserves |
| Artemisia | | Athena's daughter. Aka: Art. |
| Takis | | Tig's cousin. |
| Frank | Keurig | Willa's acquaintance. |
| Emma | Keurig | Frank Keirig's wife. |
16 | | | Blue sSky |
| Thomas | | A lawyer. |
17 | | | The Downfall |
| Priya | | Zeke's friend. |
| Willa | Cather | American writer. |
| DeeLouise | Cameron | Willa's acquaintance. Aka: Delouse. |
18 | | | Survival |
| William | | Phoebe's cousin. |