| 9.0 |  | Star Trek the Next Generation | 1987 | Action Adventure Mystery Mystery Sci-Fi Series | Cliff Bole | Patrick Stewart Brent Spiner Jonathan Frakes | * 3.9/5 |
| 9.0 | | The Expanse | 2015 | Drama Mystery Sci-Fi Sci-Fi Thriller Series | Breck Eisner | Steven Strait Cas Anvar Dominique Tipper | * 3.6/5 |
| 9.0 | | The Boys | 2019 | Action Comedy Crime Crime Sci-Fi Series | Philip Sgriccia | Karl Urban Jack Quaid Antony Starr | |
| 8.7 | | Star Trek the Original Series | 1966 | Action Adventure Sci-Fi Series | Marc Daniels | William Shatner Leonard Nimoy DeForest Kelley | |
| 8.7 | | Star Trek Original | 1966 | Action Adventure Sci-Fi Series | Marc Daniels | William Shatner Leonard Nimoy DeForest Kelley | |
| 8.6 | | Elfen Lied | 2004 | Action Animation Comedy Comedy Drama Horror Mystery Romance Sci-Fi Thriller Mini-Series Japan | Mamoru Kanbe | Sanae Kobayashi Chihiro Suzuki Mamiko Noto | |
| 8.5 | | Star Trek Deep Space Nine | 1993 | Action Adventure Drama Drama Sci-Fi Series | David Livingston | Avery Brooks Rene Auberjonois Cirroc Lofton | * 4.3/5 |
| 8.5 | | Counterpart | 2017 | Drama Sci-Fi Thriller Series | Jennifer Getzinger | J.K. Simmons Olivia Williams Harry Lloyd | - 7/10 |
| 8.5 | | The Man in the High Castle | 2015 | Drama Sci-Fi Thriller Series | Daniel Percival | Alexa Davalos Luke Kleintank Rufus Sewell | |
| 8.5 | | MADE IN ABYSS | 2017 | Adventure Animation Drama Drama Fantasy Mystery Sci-Fi Japan Series | Masayuki Kojima | Miyu Tomita Mariya Ise Luci Christian | |
| 8.5 | | Eureka | 2006 | Adventure Comedy Drama Drama Romance Sci-Fi Series | Mike Rohl | Colin Ferguson Salli Richardson-Whitfield Erica Cerra | |
| 8.3 | | Star Trek Voyager | 1995 | Action Adventure Sci-Fi Series | David Livingston | Kate Mulgrew Robert Beltran Roxann Dawson | * 3.9/5 |
| 8.1 | | Todd McFarlanes Spawn | 1997 | Action Adventure Adventure Animation Crime Drama Fantasy Horror Mystery Romance Sci-Fi Thriller Series | Jennifer Yuh Nelson | Keith David Richard Dysart Dominique Jennings | |
| 8.0 | | Amazon Riders | 2016 | Action Drama Horror Horror Sci-Fi Thriller Mini-Series Japan | Hidenori Ishida | Tom Fujita Masashi Taniguchi Rena Takeda | |
| 7.8 | | Defiance | 2013 | Action Drama Sci-Fi Series | Michael Nankin | Grant Bowler Stephanie Leonidas Julie Benz | * 4.0/5 |
| 7.8 | | Princess Principal | 2017 | Action Adventure Adventure Animation Drama Sci-Fi Japan Series | Masaki Tachibana | Ayaka Imamura Akira Sekine You Taichi | |
| 7.3 | | LEGO Ninjago Masters of Spinjitzu | 2011 | Action Adventure Adventure Animation Comedy Family Fantasy Sci-Fi Series | Peter Hausner | Michael Adamthwaite Kelly Metzger Kirby Morrow | |
| 7.1 | | Broken Blade | 2010 | Action Animation Drama Drama Fantasy Sci-Fi Japan | Tetsurô Amino | Soichiro Hoshi Chiwa Saito Hiroshi Kamiya | |
| 7.0 | | KILLING BITES | 2018 | Action Animation Sci-Fi Japan Series | Yasuto Nishikata | Sora Amamiya Maaya Uchida | |
| 6.9 | | Cyberchase | 2002 | Adventure Adventure Animation Comedy Family Mystery Sci-Fi Short Series | Larry Jacobs | Novie Edwards Annick Obonsawin Jacqueline Pillon | * 3.4/5 |
| 6.9 | | Salvation | 2017 | Drama Sci-Fi Thriller Series | Stuart Gillard | Santiago Cabrera Jennifer Finnigan Charlie Rowe | * * |
| 6.9 | | UQ Holder | 2017 | Action Animation Fantasy Fantasy Sci-Fi Japan Series | | Heidi Hinkle Brittney Karbowski Kalin Coates | |
| 6.8 | | Falling Water | 2016 | Drama Mystery Sci-Fi Sci-Fi Thriller Series | Jack Bender | David Ajala Lizzie Brochere Will Yun Lee | |
| 6.6 | | WordGirl | 2007 | Action Adventure Adventure Animation Comedy Family Sci-Fi Series | David SanAngelo | Dannah Feinglass Phirman Ryan Raddatz Chris Parnell | * 3.0/5 |
| 6.4 | | Odd Squad | 2016 | Action Adventure Comedy Comedy Crime Family Mystery Sci-Fi | J.J. Johnson | Millie Davis Olivia Presti Isaac Kragten | - 7.2/10 |
| 6.2 | | The Feed | 2019 | Drama Sci-Fi Series | Tinge Krishnan | Guy Burnet David Thewlis Shaquille Ali-Yebuah | |
| 6.2 | | Dino Dana | 2017 | Adventure Comedy Comedy Family Sci-Fi Short Series | J.J. Johnson | Michela Luci Saara Chaudry Amish Patel | |
| 6.0 | | Annedroids | 2013 | Family Sci-Fi Series | J.J. Johnson | Addison Holley Jadiel Dowlin Adrianna Di Liello | |
| 5.8 | | Ready Jet Go | 2016 | Animation Family Sci-Fi Series | Zac Palladino | Ashleigh Ball Jaeda Lily Miller William Ainscough | |
| 5.8 | | Atom the Beginning | 2017 | Animation Sci-Fi Japan Series | Katsuyuki Motohiro | Takuma Terashima Yichi Nakamura Yki Inoue | |
| 4.8 | | End of the World | 2013 | Action Adventure Drama Drama Sci-Fi Thriller | Steven R. Monroe | Greg Grunberg Neil Grayston Caroline Cave | * 2.7/5 |
| * | | Two Worlds the Series | 2018 | Sci-Fi Series | | Devante Flemming Megan Roper Sarah Crispin | |
