| 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. |
