Most Terrific Sci-Fi TV Series of All Time

Science fiction TV has always pulled us into new worlds. From spaceships exploring distant galaxies to dystopian futures right here on Earth, these shows spark our imagination and make us think about what’s possible. They mix adventure, technology, and big ideas to create stories that stick with us long after the credits roll.

This list rounds up 35 of the best sci-fi TV series ever made. Each one has shaped the genre with bold storytelling, unforgettable characters, or groundbreaking ideas. Whether you love classic adventures or modern mind-benders, these shows are must-watches for any sci-fi fan.

‘The Orville’ (2017–Present)

This show follows the crew of a mid-level spaceship 400 years in the future. It blends humor with heartfelt sci-fi adventures. Seth MacFarlane stars as Captain Ed Mercer, leading a diverse team through space missions. The mix of comedy and serious themes makes it unique.
It pays homage to ‘Star Trek’ while carving its own path. The show tackles big ideas like ethics and society with a light touch. Strong characters and fun stories keep viewers hooked. It’s a great pick for fans who want both laughs and deep thoughts.

‘Under the Dome’ (2013–2015)

Based on Stephen King’s novel, this series traps a small town under a mysterious dome. The residents of Chester’s Mill face chaos and secrets as they try to survive. The show starts with a gripping premise that pulls you in. It explores how people react under pressure.
The sci-fi mystery keeps you guessing about the dome’s origin. Strong performances, like Mike Vogel as Barbie, add depth to the drama. While later seasons lost some steam, the early episodes are intense. It’s a solid choice for fans of contained sci-fi thrillers.

‘The Jetsons’ (1962–1963)

This classic animated show follows a family in a futuristic world. George Jetson and his family live with flying cars and robot maids. The show’s catchy theme and colorful world made it a hit. It’s a fun look at how the ‘60s imagined the future.
Despite its age, the humor and charm still work today. It blends family comedy with sci-fi gadgets in a way that feels timeless. The show influenced many futuristic stories that followed. It’s perfect for viewers who love lighthearted sci-fi.

‘Astro Boy’ (1963–1966)

This anime follows a robot boy with human emotions fighting evil. Created in Japan, it was one of the first anime to gain global fame. Astro Boy’s adventures are action-packed and heartfelt. The show set the stage for anime’s rise in the West.
Its black-and-white visuals and simple stories still hold up. It tackles themes like identity and humanity through a robot’s eyes. The mix of fun and deeper ideas makes it a classic. Fans of anime and sci-fi will enjoy its pioneering spirit.

‘Thunderbirds’ (1965–1966)

This British series uses puppets to tell stories of International Rescue. The Tracy family saves the world with high-tech vehicles. The show’s unique style and thrilling missions made it a hit. It’s a nostalgic gem with a futuristic vibe.
The detailed sets and creative gadgets spark imagination. Stories focus on teamwork and heroism, appealing to all ages. Its influence lives on in modern sci-fi adventures. It’s a must-watch for fans of retro sci-fi action.

‘Mork & Mindy’ (1978–1982)

This sitcom stars Robin Williams as Mork, an alien studying Earth. He lands in 1970s Boulder and lives with human Mindy. The show’s humor comes from Mork’s quirky view of human life. It’s a light, funny take on sci-fi.
Williams’ wild energy makes every episode a blast. The show blends comedy with small sci-fi touches, like Mork’s reports to his home planet. It’s less about tech and more about heart. Fans of feel-good sci-fi will love it.

‘ALF’ (1986–1990)

This comedy follows ALF, an alien who crashes into a suburban family’s garage. He’s sarcastic, furry, and loves to eat cats. The Tanner family hides him while he tries to fix his ship. The show’s humor and charm made it a ‘80s favorite.
ALF’s witty one-liners and fish-out-of-water antics keep things fun. It mixes sci-fi with family sitcom vibes perfectly. The show’s simple premise delivers big laughs. It’s great for viewers who want a cozy sci-fi comedy.

‘Planet of the Apes’ (1974)

Astronauts crash-land in a future where apes rule and humans are slaves. This short-lived series builds on the famous movie franchise. It follows two humans navigating a strange, ape-dominated world. The premise grabs you from the start.
The show explores power and prejudice through a sci-fi lens. Strong performances, like Roddy McDowall as an ape ally, add depth. Though it only lasted one season, its bold ideas stand out. It’s a treat for fans of classic sci-fi drama.

‘The Outer Limits’ (1963–1965)

This anthology series delivers standalone sci-fi stories with a creepy edge. Each episode explores aliens, tech, or strange phenomena. Its eerie intros and bold ideas made it a genre pioneer. It’s often compared to ‘The Twilight Zone’ for its impact.
The show’s mix of horror and sci-fi creates unforgettable tales. From mutant creatures to time travel, it pushes boundaries. The 1990s revival added modern flair but kept the spooky vibe. It’s perfect for fans of short, thought-provoking sci-fi.

‘Killjoys’ (2015–2019)

This series follows a trio of bounty hunters in a distant galaxy. They chase dangerous targets while navigating political chaos. The show’s fast pace and witty banter keep it exciting. It’s a fun, action-packed space adventure.
The chemistry between leads Hannah John-Kamen and Aaron Ashmore shines. The show balances humor with deeper themes like loyalty and survival. Its vibrant world and strong characters make it stand out. Fans of space operas will enjoy the ride.

‘V: The Final Battle’ (1984)

This miniseries continues the story of aliens invading Earth. The Visitors seem friendly but hide dark plans. Humans fight back in a tense sci-fi thriller. It builds on the original ‘V’ series with bigger stakes.
The show mixes action, suspense, and alien intrigue. Marc Singer and Faye Grant lead a strong cast. Its ‘80s style and bold story made it a hit. It’s a great pick for fans of classic alien invasion tales.

‘Millennium’ (1996–1999)

This dark series follows Frank Black, a former FBI agent with a psychic gift. He hunts killers and uncovers eerie mysteries. The show blends sci-fi, horror, and crime drama. Its moody tone sets it apart.
Lance Henriksen’s intense performance anchors the series. It explores human darkness and supernatural threats with a sci-fi twist. Though less known than ‘The X-Files’, it’s just as gripping. Fans of creepy sci-fi will find it compelling.

‘Logan’s Run’ (1977–1978)

Based on the film, this series follows a man escaping a dystopian society. In the 23rd century, people are killed at age 30. Logan and his allies flee to find freedom. The premise is thrilling and full of tension.
The show’s mix of action and futuristic ideas keeps it engaging. It explores themes of control and rebellion in a sleek sci-fi world. Though short-lived, its bold story leaves a mark. It’s a hidden gem for dystopian sci-fi fans.

‘seaQuest DSV’ (1993–1996)

This series follows a high-tech submarine protecting underwater colonies. Earth’s resources are scarce, and the crew faces deep-sea dangers. Roy Scheider stars as the captain of the futuristic vessel. The show’s ocean setting feels fresh.
It blends adventure with sci-fi tech like AI and underwater cities. The stories mix exploration with environmental themes. Though uneven at times, its ambition stands out. Fans of unique sci-fi settings will enjoy it.

‘Almost Human’ (2013–2014)

Set in 2048, this series follows a cop paired with an android partner. John Kennex, played by Karl Urban, navigates a high-tech world after a coma. The show’s buddy-cop dynamic adds fun to its sci-fi premise. It tackles AI and human connection.
The chemistry between Urban and Michael Ealy’s android is a highlight. Sleek visuals and action keep the pace fast. Though canceled after one season, it’s a fan favorite. It’s great for viewers who love gritty sci-fi.

‘Terra Nova’ (2011)

In a dying future Earth, a family travels back to prehistoric times. They join a colony to restart human civilization. The show blends dinosaurs with sci-fi drama. Its high-concept premise grabs attention.
Jason O’Mara leads a strong cast in this time-travel adventure. The mix of survival and family dynamics keeps it grounded. Though it ended early, its bold ideas shine. Fans of epic sci-fi will find it thrilling.

‘Sanctuary’ (2008–2011)

This series follows Dr. Helen Magnus, who protects strange creatures. Her team investigates supernatural and sci-fi mysteries. Amanda Tapping stars as the brilliant, immortal scientist. The show’s mix of myth and science is unique.
It blends monster hunts with deep character stories. The world-building, with hidden sanctuaries and odd beings, feels rich. Its low budget adds charm to its creativity. It’s a great pick for fans of quirky sci-fi.

‘Dark Angel’ (2000–2002)

Jessica Alba stars as Max, a genetically enhanced superhuman. She escapes a secret facility and fights for freedom in a dystopian future. The show’s action and cyberpunk vibe are gripping. It’s a gritty take on sci-fi.
Max’s journey blends strength with vulnerability, making her relatable. The world, filled with corruption and tech, feels alive. Though it ended early, its cult following endures. Fans of tough heroines and sci-fi will love it.

‘Tales of Tomorrow’ (1951–1953)

This early anthology series delivers standalone sci-fi stories. Each episode explores futuristic ideas or strange events. It predates ‘The Twilight Zone’ and set the stage for sci-fi TV. Its historical impact is huge.
The show’s dark tales and surprising twists keep you hooked. Simple effects don’t detract from its bold ideas. It’s a time capsule of early sci-fi imagination. Fans of retro TV will enjoy its pioneering spirit.

‘Future Man’ (2017–2020)

Josh Hutcherson stars as a janitor recruited by video game characters. He must save the universe in this wild sci-fi comedy. The show’s humor and absurd plots make it a blast. It pokes fun at sci-fi tropes.
The mix of time travel and quirky characters keeps it fresh. Seth Rogen’s influence adds a sharp edge to the comedy. It’s short but packed with laughs. Fans of silly sci-fi adventures will have fun.

‘The Bionic Woman’ (1976–1978)

This spin-off follows Jaime Sommers, a woman with robotic enhancements. After an injury, she gains super strength and speed. Lindsay Wagner shines as the heroic lead. The show’s ‘70s charm is undeniable.
It blends action with human stories about identity and duty. Jaime’s missions, from fighting spies to saving lives, are thrilling. It’s a classic that inspired many superhero shows. Fans of retro sci-fi will love it.

‘Lost in Space’ (1965–1968)

A family’s space mission goes wrong, stranding them in the cosmos. The Robinsons face aliens and tech disasters. The show’s campy style and adventure made it a hit. It’s a fun, retro sci-fi romp.
The dynamic between the family and the sneaky Dr. Smith adds drama. Its colorful visuals and wild plots keep it engaging. The recent reboot nods to its legacy. Fans of classic space stories will enjoy it.

‘Supernatural’ (2005–2020)

Brothers Sam and Dean Winchester hunt paranormal threats. This long-running show mixes sci-fi, horror, and fantasy. Its monster-of-the-week format evolves into epic sci-fi tales. The brothers’ bond is the heart of the show.
Jensen Ackles and Jared Padalecki deliver strong performances. The mix of humor, heart, and spooky sci-fi keeps fans hooked for 15 seasons. It’s a cultural touchstone. Fans of genre-blending sci-fi will love it.

‘Sliders’ (1995–2000)

A group led by Quinn Mallory jumps between parallel universes. Each world has a unique twist, from utopias to dystopias. Jerry O’Connell stars in this fun, ‘90s sci-fi adventure. The concept is endlessly creative.
The show explores “what if” scenarios with humor and heart. Later seasons lost some focus, but early episodes shine. Its multiverse idea influenced modern sci-fi. Fans of alternate reality stories will enjoy it.

‘The Prisoner’ (1967–1968)

A former spy, Number Six, is trapped in a mysterious village. He fights to escape while uncovering its secrets. Patrick McGoohan stars in this surreal British series. Its mind-bending story stands out.
The show mixes sci-fi, spy drama, and psychological thrills. Its questions about freedom and control are timeless. The unique setting and bold ideas make it a classic. Fans of cerebral sci-fi will find it gripping.

‘Star Wars: The Clone Wars’ (2008–2020)

This animated series expands the ‘Star Wars’ prequel era. It follows Jedi and clones in epic battles during a galactic war. The show’s stunning animation brings the universe to life. It’s a fan-favorite for a reason.
Characters like Ahsoka Tano add depth to the ‘Star Wars’ saga. The mix of action, politics, and heart makes it compelling. It’s a must-watch for sci-fi and ‘Star Wars’ fans. Its legacy lives on in spin-offs.

‘Severance’ (2022–Present)

This series follows workers whose memories are split between work and life. They uncover dark secrets about their employer, Lumon Industries. Adam Scott leads a stellar cast. The premise is chilling and original.
The show’s sleek style and psychological depth grip you. It explores identity and corporate control in a fresh way. Its timely themes resonate in today’s world. Fans of thought-provoking sci-fi will be hooked.

‘Cowboy Bebop’ (1998–2000)

This anime follows a bounty-hunting crew in a futuristic solar system. Spike Spiegel and his team chase targets on their ship, the Bebop. The show’s jazz vibe and noir style are iconic. It’s a genre-blending masterpiece.
The mix of action, humor, and emotional depth sets it apart. Each character’s past adds layers to the story. Its influence on sci-fi and anime is massive. Fans of stylish sci-fi will love it.

‘Silo’ (2023–Present)

Based on Hugh Howey’s novels, this series follows a community in a massive underground silo. They uncover secrets about their world’s past. Rebecca Ferguson stars as a curious engineer. The mystery drives the show.
The dystopian setting and tight storytelling keep you glued. It explores survival and truth in a confined world. The show’s visuals and pacing are top-notch. Fans of hard sci-fi will find it gripping.

‘Loki’ (2021–2023)

This ‘Marvel’ series follows Loki, the trickster god, through time-travel adventures. He works with the Time Variance Authority to fix timeline chaos. Tom Hiddleston shines as the charming antihero. The show’s wit and style pop.
It introduces bold sci-fi ideas like multiverses to the MCU. The mix of humor, action, and mystery keeps it fresh. It’s a standout in Marvel’s TV lineup. Fans of clever sci-fi will enjoy the ride.

‘3 Body Problem’ (2024–Present)

Based on Liu Cixin’s novel, this series tracks scientists facing an alien threat. Humanity’s survival hangs in the balance as secrets unfold. The show’s epic scope and hard sci-fi roots grab you. It’s a bold Netflix hit.
The story’s mix of science, dread, and global stakes is intense. Stunning visuals and a strong cast make it immersive. It tackles big ideas about humanity’s future. Fans of cerebral sci-fi will be captivated.

‘The Twilight Zone’ (1959–1964)

This anthology series delivers sci-fi and horror with shocking twists. Each episode tells a standalone story about human nature or technology. Rod Serling’s narration adds a haunting touch. It’s a timeless classic.
The show’s bold ideas and moral questions still resonate. From time travel to alien encounters, it shaped sci-fi TV. Its influence is seen in countless modern shows. Fans of thought-provoking stories will love it.

‘The Mandalorian’ (2019–2023)

A lone bounty hunter protects a mysterious child in the ‘Star Wars’ universe. The show’s Western vibe and Baby Yoda stole hearts. Pedro Pascal leads with quiet strength. It’s a global phenomenon.
The cinematic visuals and tight stories make it a standout. It expands ‘Star Wars’ lore while staying accessible. The mix of action and heart keeps fans hooked. Sci-fi and ‘Star Wars’ lovers will enjoy it.

‘Black Mirror’ (2011–Present)

This anthology series explores dark futures driven by technology. Each episode delivers a standalone cautionary tale. The show’s sharp writing and eerie premises grip you. It’s a modern sci-fi masterpiece.
From social media horrors to AI nightmares, it’s unsettlingly relevant. The varied stories keep every episode fresh. Its cultural impact is huge, sparking real-world debates. Fans of dystopian sci-fi will be hooked.

‘Stranger Things’ (2016–2025)

Set in the 1980s, this series follows kids facing supernatural threats. A government lab and an alternate dimension drive the mystery. The young cast, led by Millie Bobby Brown, shines. It’s a nostalgic sci-fi hit.
The show blends horror, sci-fi, and coming-of-age drama perfectly. Its ‘80s vibes and monster-filled Upside Down keep you hooked. It’s a cultural juggernaut with wide appeal. Fans of thrilling sci-fi will love it.

What’s your favorite sci-fi series, and which one from this list do you think deserves a rewatch? Share your picks in the comments!