Science fiction has a massive, passionate fanbase, but not everyone has explored the genre's deepest cuts. While casual viewers might know the big names, true devotees have a shared canon of shows that define the genre. We've rounded up seven series that every sci-fi fan should have on their watchlist—some are beloved classics, others are underrated treasures. If you haven't seen these, you might want to reconsider your fan status.
Fringe (2008–2013)
This Fox series is a cult favorite that blends sci-fi with the paranormal in wonderfully weird ways. Fringe follows an FBI division that investigates fringe science and paranormal incidents linked to a parallel universe. It was one of the first shows to dive deep into the multiverse concept, long before it became trendy. If you want to be a true sci-fi fan, this bizarre, brilliant show is a must-watch.
Humans (2015–2018)
AMC imported this British series about humanoid robots called "synths" and their impact on society. Humans explores the social and psychological effects of AI in a thoughtful, unsettling way. It's a gem that didn't get the attention it deserved, but diehard fans remember it fondly. For a deeper dive into similar themes, check out Black Mirror's best episode.
The Outer Limits (1963–1965)
Often overshadowed by The Twilight Zone, this ABC anthology series is a horror-sci-fi pioneer. Its stories pushed boundaries further, with terrifying episodes that still hold up. If you call yourself a sci-fi fan, you owe it to yourself to experience this classic.
Black Mirror (2011–Present)
Charlie Brooker's anthology is a modern Twilight Zone, examining how technology can go horribly wrong. From social media scores to neural implants, each episode holds a dark mirror to our digital lives. It's essential viewing for anyone who loves thought-provoking sci-fi. For more underrated gems, see our list of overlooked Netflix thrillers.
Westworld (2016–2022)
HBO's mind-bending series about a futuristic Wild West theme park populated by AI hosts is a modern masterpiece. Its first season is particularly acclaimed, exploring consciousness, free will, and morality. If you haven't seen it, you're missing out on a defining sci-fi experience. Read why Westworld season 1 remains a sci-fi masterpiece.
The Twilight Zone (1959–1964)
Rod Serling's iconic anthology is the gold standard for sci-fi storytelling. Its blend of social commentary, suspense, and the supernatural influenced countless shows. Every fan should know classics like "Time Enough at Last" and "The Monsters Are Due on Maple Street."
Doctor Who (1963–Present)
The longest-running sci-fi series in history follows the Doctor, a time-traveling alien. With decades of adventures, it's a cornerstone of the genre. Whether you start with the classic series or the 2005 revival, it's essential viewing for any fan.
These seven shows represent the best of sci-fi television. Whether you're revisiting old favorites or discovering new ones, they're all worth your time. For more binge-worthy recommendations, check out our list of perfect Netflix shows under 20 episodes.
