| 100% | SHADOWHUNTERS | 13 | Fantasy TV series based on "The Mortal Instruments" novels by Cassandra Clare |
| 65% | OUTLANDER | 9 | Fantasy TV series based on novels of the same name by Diana Gabaldon |
| 61% | TRUEBLOOD | 9 | Fantasy TV series based on "The Southern Vampire Mysteries" novels by Charlaine Harris (2 wds.) |
| 59% | GAMEOFTHRONES | 13 | Fantasy TV series based on the novels of George R. R. Martin: 3 wds. |
| 51% | TRIPODS | 7 | The —, 1980s BBC TV series based on novels by John Christopher |
| 49% | FARGO | 5 | TV series based on a 1996 film by the Coen brothers |
| 48% | THETRIPODS | 10 | 1980s BBC TV series based on novels by John Christopher |
| 48% | SWEETBITTER | 11 | American drama TV series starring Ella Purnell which is based on a novel of the same name by Stephanie Danler |
| 47% | LIARS | 5 | "Pretty Little ___" (former teen drama TV series based on novels by Sara Shepard) |
| 46% | THEALIENIST | 11 | American period drama TV series starring Dakota Fanning which is based on a novel of the same name by Caleb Carr: 2 wds. |
| 46% | BIG | 3 | With 60-Across, TV crime series based on the novel "The Highway" by C.J. Box |
| 46% | ALTEREDCARBON | 13 | American dystopian sci-fi TV series starring Joel Kinnaman which is based on a novel of the same name by Richard K. Morgan: 2 wds. |
| 45% | DISCLAIMER | 10 | Apple TV+ series based on a novel by Renée Knight |
| 45% | WITCHER | 7 | "The ___," 2019 TV series based on the book series by Andrzej Sapkowski which was adapted into a video game |
| 45% | TEEN | 4 | "___ Wolf," supernatural drama TV series based on the 1985 film of the same name, about a youngster who is bitten by a werewolf |
| 45% | EVE | 3 | "Killing ___" (Sandra Oh series based on the "Villanelle" novels by Luke Jennings) |
| 44% | TRUEBLOOD | 9 | TV series based on The Southern Vampire Mysteries |
| 44% | POLDARK | 7 | TV series based on the title character and Demelza |
| 44% | TURN | 4 | TV series based on the Culper Ring of spies |
| 42% | AANDE | 5 | Original network for the series based on the 18-Across novels by 40-Across (3 wds.) |
| 42% | HANNIBAL | 8 | Horror TV series based on Thomas Harris novels |
| 41% | CASTLEVANIA | 11 | 2017 anime-influenced TV series based on the video game series of the same name |
| 40% | OUTSIDER | 8 | "The ___," 2020 psychological crime drama TV series based on Stephen King's eponymous novel |
| 40% | DAKTARI | 7 | 1960's TV series based on "Clarence, the Cross-Eyed Lion" |
| 40% | DRAGONS | 7 | "Dota: ___ Blood," 2021 animated TV series based on the video game series of the same name |
| 40% | GOSSIPGIRL | 10 | TV series with Blake Lively and Leighton Meester that is based on Cecily von Ziegesar's novel of the same name: 2 wds. |
| 40% | BONES | 5 | Former TV series based on Kathy Reichs novels about a forensic anthropologist |
| 40% | CITY | 4 | TV series "Sex and the ___" with Sarah Jessica Parker that is based on Candace Bushnell's novel of the same name |
| 40% | SERENITY | 8 | 2005 movie based on the TV series "Firefly" |
| 40% | DIAGNOSIS | 9 | Documentary web TV series based on The New York Times Magazine column that was released in 2019 |