It’s always fascinating when new television ideas and themes become universal staples, rather than just passing fads. There is still no shortage of television series that toe the line between procedural stories, which reset the slate at the end of each episode, and shows where a serialized mystery continually propels the characters forward.
A lot of science fiction and genre series have turned to a “monster of the week” formula where random supernatural tales can mix things up from the usual narrative. In some series, the monster of the week procedural stories have left behind a greater legacy than the show’s larger mystery.
10 Smallville
Decades before superhero series and prequel origin series were the norms, Smallville told its own version of Clark Kent's formative years as a high school student in Smallville, Kansas. Smallville functions as Superman's humble origins and does the same for other pivotal DC characters, including its own rudimentary take on the Justice League.
Smallville produced 10 seasons and more than 200 episodes, not all of which are winners. For some fans, the less said about the magic-based episodes, the better. However, the shows always presented a unique take on standalone superhero storytelling before it was omnipresent.
9 Millennium
Chris Carter’s success with the creation of The X-Files earned him a blank check for other supernatural series. The show only lasted three seasons and never reached mainstream acclaim, but Millennium found a passionate cult audience who appreciated its grim stories. Millennium focused on multiple murderers and heightened violent criminals who were driven by religion, spirituality, or cryptic conspiracy theories.
Millennium would also occasionally explore paranormal creatures that would shatter Frank Black's careful worldview. The ongoing story arc in Millennium becomes a mess, though The X-Files resolves it and there are some excellent standalone stories hidden in the show.
8 DC's Legends Of Tomorrow
The CW Network thrived during the 2010s with its growing Arrowverse, which routinely pulled off massive crossover events while the DC Extended Universe languished. Fans were skeptical of DC’s Legends of Tomorrow, as the series was a crossover hybrid that featured discarded misfits from other CW DC shows.
After a rough first season, Legends of Tomorrow finds its voice through constant silliness and a compulsion to laugh in the face of superhero stereotypes and reverence. Legends of Tomorrow benefits from time travel, and each episode has the luxury of tackling a different time period where famous historical figures can get mashed together with comic book characters.
7 Grimm
Grimm lasted for six seasons on NBC and had a lot of the same creators as Buffy, Angel, and The X-Files, which certainly helped it achieve a higher level of quality with its standalone storytelling. Magical animal-human hybrids named Wesen are the primary dangers in Grimm, but over the course of 123 episodes, there are some creative riffs on established monsters as well as completely new ideas.
The procedural episodes in Grimm occasionally lean more into the fantasy and crime genres. That being said, Grimm quickly finds a unique and entertaining rhythm.
6 Evil
Evil has three seasons, with at least one more on the way. The show has comfortably embraced its role as a modern X-Files, albeit one that focuses more on spirits than extraterrestrials. Kristen and David easily fit into the skeptic and believer archetypes, and Evil does exceptional work with how it rips current events from the headlines and adapts them into its supernatural universe.
Evil keeps its characters and audience on their toes about whether angels and demons actually exist. A series of seemingly unexplainable events mean that there's never a dull moment in Evil.
5 Buffy, The Vampire Slayer & Angel
There are more than 250 episodes between Buffy, the Vampire Slayer and its spin-off, Angel. Both of these supernatural series have different aims and act as deconstructions of unique periods of life. However, the shows are set in the same universe, consistently crossover, and feature comparable monsters.
Buffy begins as a tongue-in-cheek metaphor for how high school can be hell. The show slowly cycles through most horror staples like vampires, witches, werewolves, and demi-gods. However, Buffy and Angel both do some of their most effective work through original creations, whether it’s Buffy’s voice-stealing Gentlemen or Angel’s puppet-transforming spell. The Hellmouth never runs out of macabre creations.
4 Supernatural
Eric Kripke, Supernatural’s creator, left the series after its fifth season, which ostensibly works as an ending and wraps up the show’s original mission. However, Supernatural goes on for 10 additional seasons and a monumental total of 327 episodes.
Admittedly, many of Supernatural’s later episodes can feel like parodies as both the series and the Winchester siblings experience identity crises. While the grander storylines in the final seasons deserve criticism, the show still maintains high quality when it comes to Supernatural's episodic monster of the week stories. For example, “Scoobynatural,” which pairs Sam and Dean up with the Mystery Incorporated crew, is a series highlight and doesn’t arrive until Season 13.
3 Kolchak: The Night Stalker
Kolchak: The Night Stalker only received one 20-episode season during the 1970s, but it helped set the modern standard for monster of the week storytelling. Without Kolchak, there would be no X-Files, Buffy, or even LOST. Darren McGavin stars as Carl Kolchak, an investigative newspaper reporter whose work on supernatural cases consumes him.
Kolchak's cases can cover Vegas vampires, reanimated corpses, and even mysterious and murderous swamp moss. Kolchak would live on through a series of made-for-TV movies and a short-lived reboot, but its DNA is very much alive in modern monster of the week series.
2 The X-Files
The X-Files was one of the biggest TV shows during the 1990s. It’s a rare series that successfully transitioned to movie theaters and received a modern sequel series extension. There are 218 episodes between the 11 seasons of The X-Files, which amounts to more than 100 strange, silly, and satisfying monster of the week stories.
The ongoing “mytharc” episodes of The X-Files, not to mention Mulder and Scully’s will-they-won’t-they chemistry, is what initially drew viewers in. However, it's the inconsequential standalone episodes that hold up on rewatches and properly highlight the versatility and creativity of The X-Files.
1 Fringe
Fringe delivers 100 strong episodes across five ambitious seasons of sci-fi television. It definitely takes a page out of The X-Files’ book, but it improves upon The X-Files' formula. Fringe finds a way to perfectly interweave seemingly standalone monster of the week stories into the grander narrative. The show presents impossible events right from its first episode, but it’s not until its second season that its full multiversal scope becomes apparent.
Fringe dips into compelling stories of control, technology, and science, which are all able to gain depth as they’re deconstructed on multiple Earths. Fringe gets into monsters, evil geniuses, the collapse of reality, and everything in between.