Long before slime became a staple of kids’ TV and irreverent humor took over children’s programming, there was You Can’t Do That on Television—a sketch comedy show that gleefully broke the rules. Airing from 1979-1990, this Canadian-made series gave kids something they hadn’t really seen before: a show that felt like it was made for them, not just about them.
With its chaotic sketches, running gags, and a cast made up largely of teenagers, the show became a cult classic—and a foundational influence on modern children’s entertainment.
A Scrappy Start in Ottawa
The series began in 1979 at a small station in Ottawa, created by Roger Price and Geoffrey Darby. Originally envisioned as a local variety show, it quickly evolved into something much more distinctive.
Instead of polished performances by adult actors, You Can’t Do That on Television featured a rotating cast of kids and teens delivering jokes, acting in sketches, and often poking fun at authority figures. The low-budget production only added to its charm—sets were simple, effects were obvious, and the humor felt spontaneous.
It wasn’t long before the show caught the attention of a larger audience.
Nickelodeon and International Fame
The real breakthrough came when the show was picked up by Nickelodeon in the early 1980s. At the time, Nickelodeon was still defining its identity, and You Can’t Do That on Television became one of its flagship programs.
For American audiences, the show felt fresh and slightly rebellious. It didn’t follow the traditional rules of children’s programming. Instead of moral lessons neatly wrapped up at the end of each episode, it delivered messy, unpredictable comedy.
The show’s popularity on Nickelodeon helped turn it into an international hit, introducing its uniquely Canadian sense of humor to viewers around the world.
The Birth of Slime
If there’s one thing You Can’t Do That on Television is most famous for, it’s slime.
The show introduced the now-iconic green slime gag, where cast members would get drenched whenever someone said, “I don’t know.” It was gross, unexpected, and absolutely hilarious to kids.
This simple visual joke became a defining feature of the show—and eventually of Nickelodeon itself. Slime went on to appear in countless other programs, award shows, and events, becoming one of the most recognizable elements of kids’ television.
It’s no exaggeration to say that this Canadian show helped create an entire visual language for children’s entertainment.
Comedy That Talked With Kids, Not Down to Them
What truly set You Can’t Do That on Television apart was its tone. The humor was sharp, sarcastic, and often surprisingly subversive.
The show tackled everyday frustrations—strict parents, boring school, unfair rules—and exaggerated them for comedic effect. Authority figures were frequently portrayed as clueless or overbearing, giving young viewers a sense of validation.
At the same time, the show never felt mean-spirited. Its humor came from exaggeration and absurdity rather than cruelty. The result was a tone that felt honest and relatable.
For many kids, watching the show felt like being in on a joke that adults didn’t fully understand.
Memorable Cast and Characters
Unlike many children’s shows, You Can’t Do That on Television didn’t rely on a single central character. Instead, it featured an ensemble cast of young performers who rotated in and out over the years.
Actors like Christine McGlade and Les Lye became fan favorites. Les Lye, in particular, stood out as the only adult regular, playing a variety of exaggerated authority figures—from teachers to parents to judges.
His over-the-top performances provided the perfect foil for the kids, creating a dynamic that fueled many of the show’s best sketches.
Running Gags and Absurd Humor
Part of the show’s appeal was its use of recurring jokes and catchphrases. In addition to the slime, there were water dumpings triggered by the phrase “water,” locker gags, and a variety of visual punchlines that viewers came to expect—and eagerly anticipate.
This repetition created a sense of familiarity while still leaving room for surprise. You knew something ridiculous was going to happen—you just didn’t know exactly when.
The sketches themselves ranged from parody to pure nonsense. Some mocked television tropes, while others leaned into surreal humor that made little logical sense but landed perfectly with its audience.
A Lasting Influence on Kids’ Television
The impact of You Can’t Do That on Television can still be seen today. Its DNA is present in countless shows that followed, particularly those on Nickelodeon.
Programs like All That and even elements of modern kids’ programming owe a clear debt to its format and tone. The idea that kids could be the stars of their own sketch comedy show—and that they could be funny, messy, and irreverent—was groundbreaking at the time.
It also helped establish Nickelodeon’s identity as a network that prioritized kids’ perspectives, setting it apart from more traditional broadcasters.
Why It Ended—but Didn’t Disappear
The show ran until 1990, with various format changes and cast rotations along the way. Like many long-running series, it eventually faced challenges in maintaining its original energy and appeal.
However, its legacy didn’t fade. Reruns continued to introduce new audiences to its unique style, and longtime fans held onto their memories of its most iconic moments.
In the age of the internet, clips and references have kept the show alive, allowing it to reach viewers who weren’t around during its original run.
A Uniquely Canadian Contribution
You Can’t Do That on Television is also a reminder of Canada’s impact on global entertainment.
Its success demonstrated that great ideas don’t need massive budgets—just creativity, authenticity, and a willingness to take risks.
The Show That Broke the Rules—and Won
You Can’t Do That on Television wasn’t polished, predictable, or conventional. That’s exactly why it worked.
By giving kids a voice, embracing absurdity, and refusing to play by the usual rules, it created something truly original. It made messiness fun, turned chaos into comedy, and showed that sometimes the best television comes from doing exactly what you’re told you can’t.
Decades later, its influence is still everywhere—from slime-covered game shows to kid-led sketch comedy. And for those who grew up watching it, the memory of that green slime and those wild sketches remains unforgettable.