The 1990s weren't just a decade of dial-up internet and frosted tips—they were a golden age for science fiction on the small screen. With the rise of CGI and a cultural fascination with the unknown, TV creators dared to dream bigger than ever before. The result? A wave of shows that pushed boundaries, explored deep questions, and left a lasting mark on the genre. Here are eight series that prove the '90s were the best decade for sci-fi television.
The Outer Limits (1995–2002)
While many '90s sci-fi shows leaned into serialized storytelling, The Outer Limits revived the anthology format with a modern twist. This reboot of the classic 1960s series traded monster-of-the-week for cautionary tales about technology, artificial intelligence, and body horror. Each episode stood alone, guided by the ominous voice of the Control Voice (Kevin Conway), and used a mix of practical effects and early CGI to create haunting, thought-provoking stories. With 152 episodes over seven seasons, it remains a must-watch for fans of cerebral sci-fi.
Space: Above and Beyond (1995–1996)
Co-created by James Wong and Glen Morgan—known for The X-Files and Final Destination—this series was a gritty precursor to Battlestar Galactica's reboot. Set in 2063–2064, it followed the Wildcards, a squadron of fighter pilots including artificially created In Vitroes, as they fought an interstellar war against the alien Chigs. Canceled after just one season, its 23 episodes earned Emmy nominations and a cult following for its dark realism and political depth.
Dark Skies (1996–1997)
For fans of conspiracy thrillers, Dark Skies was a hidden gem. It wove UFO lore into 1960s history, suggesting that the Roswell crash was just the start of a silent alien invasion. The show followed a young couple pursued by the secretive Majestic 12, with real events like the Kennedy assassination and the Beatles' rise reimagined as part of the cover-up. Though canceled after one season, its ambitious five-season plan and tense atmosphere make it a standout.
Stargate SG-1 (1997–2007)
Based on the 1994 film, Stargate SG-1 became the dependable workhorse of '90s sci-fi. It blended military realism with ancient mythology as a team of explorers used a network of portals to travel to other planets. Over 10 seasons, it balanced action, humor, and deep lore, spawning a franchise that includes spin-offs and movies. Its longevity and loyal fanbase prove its quality.
Babylon 5 (1993–1998)
Often called the first truly serialized sci-fi series, Babylon 5 was a space opera with a planned five-year arc. Set on a neutral space station, it tackled politics, war, and philosophy through complex characters and groundbreaking CGI. Its influence can be seen in later shows like The Expanse, and it remains a benchmark for ambitious storytelling.
The X-Files (1993–2002)
No list of '90s sci-fi is complete without The X-Files. FBI agents Mulder and Scully investigated paranormal cases, blending monster-of-the-week episodes with a sprawling alien conspiracy. Its mix of horror, humor, and government paranoia captured the zeitgeist, making it a cultural phenomenon that still inspires shows today.
Sliders (1995–2000)
This series followed a group of travelers who slid between parallel Earths, exploring alternate histories and social commentary. While it lost its way in later seasons, its early episodes were inventive and fun, offering a unique take on the multiverse concept years before it became trendy.
Farscape (1999–2003)
Though it started in the late '90s, Farscape embodied the decade's spirit of bold experimentation. An astronaut stranded in a distant galaxy joins a ragtag crew of aliens, blending puppetry, CGI, and offbeat humor. Its emotional depth and creative risks made it a cult classic.
These shows didn't just entertain—they pushed the boundaries of what TV could do. For more on the best of the decade, check out our list of the best miniseries of the last decade or explore the decade's best crime shows. The '90s may be over, but its sci-fi legacy lives on.
