Watch episodes of 'Sam and Friends,' the earliest show featuring the Muppets.

'The Muppet Show' debuted in the UK because it was rejected by every US network.

Before 'The Muppet Show,' Jim Henson produced slapstick coffee commercials featuring the puppets.

Jim Henson and his Muppets were part of the first season of 'Saturday Night Live' because NBC was hoping to tamp down Lorne Michaels' countercultural plans for the show.

Jim Henson and his creative team constructed several optical illusions to make the Muppets appear as though they walked through the real world.

Watch Jim Henson explain how to make a Muppet.

Jim Henson's 'Fraggle Rock' was the first American TV series to air in the USSR.

Fascinated by the 1960s counterculture, Jim Henson tried to build a psychedelic nightclub.

Jim Henson's lone Oscar nomination was for an experimental short film he made in the '60s that features no puppets.

Jim Henson's 1986 film 'Labyrinth' was initially a commercial failure in the US, though it slowly gained an audience that now considers it a cult classic.

'Follow your enthusiasm. It's something I've always believed in. Find those parts of your life you enjoy the most. Do what you enjoy doing.'

- "Muppets" creator Jim Henson (1936-1990)

Dolly Parton hosted two separate variety television shows called 'Dolly.'

'(Kids) don't remember what you try to teach them. They remember what you are.'

- "Muppets" creator Jim Henson (1936-1990)

Watch every 'Simpsons' short from 'The Tracey Ullman Show'

Before it was a standalone sitcom, "The Simpsons" began in 1987 as a series of interstitials on "The Tracey Ullman Show," a short-lived sketch comedy show. You'll notice some slight differences—off-kilter voices, oddly drawn characters—but the series' premise was there, leading Fox to spin it off into its own show in 1989.

Watch the 'Star Wars Holiday Special,' a 1978 spin-off that became a cult classic

The CBS television special is a hokey variety show that was widely panned after it aired and, as a result, was never officially released on home video. George Lucas had little involvement, though it did feature the original cast alongside guest stars like Bea Arthur. Interestingly, it also features Boba Fett's first appearance.

'Potter Puppet Pals' was one of the internet’s first viral videos

Created by animator Neil Cicierega in the early 2000s, Potter Puppet Pals featured felt puppets parodying the Harry Potter characters. Its 2007 video “The Mysterious Ticking Noise” became an early YouTube sensation, amassing more than 200 million views.

Check out one critic's guide to the best Muppet movies, including 'The Great Muppet Caper,' 'The Muppets Take Manhattan,' and more.

SNL's history in 60 seconds

Saturday Night Live has been a fixture of American comedy since 1975. Created by Lorne Michaels and Dick Ebersol, the show was designed as an alternative to late-night reruns, blending live sketch comedy, political satire, and celebrity impressions.

'Lazy Sunday' was YouTube's first viral hit

Initially aired on television, the 2005 "Saturday Night Live" digital short featuring Andy Samberg and Chris Parnell took off on YouTube, becoming one of the platform's first viral videos. The song may be a joke, but its success underscored how online video could extend the lifespan of regularly televised content.

Mel Brooks got his first big break in 1950 as a writer on Sid Caesar's 'Your Show of Shows,' a pioneering TV variety show.

A low-budget, Seattle-based comedy show launched Bill Nye's on-camera career

"Almost Live!" began in 1984 as a Sunday evening talk show before evolving into a sketch comedy show that served as the lead-in for "Saturday Night Live" on NBC's Seattle affiliate station. Besides Nye, TV stars Joel McHale and Lauren Weedman were regular cast members.

Michaels doesn’t care when people say ‘SNL’ was funnier when they were younger

"Generally when people talk about the best cast I think, 'Well, that's when they were in high school,'" Michaels told "Today" in 2015. "Because in high school you have the least amount of power you're ever gonna have. ... Staying up with friends later on a Saturday is great, and people attach to a cast."

Before he had his own show, Pee-wee Herman appeared on 'The Dating Game'

Paul Reubens' character Pee-wee Herman would become a sensation with his 1986 children's show "Pee-wee's Playhouse," but in 1979 he appeared as the hilariously naive character on "the Dating Game." It's not clear if the show (or its audience) understood what they were seeing.

Michael Nesmith, an original member of the '60s group the Monkees, created a music video show that inspired MTV.

A comprehensive history of 'The Simpsons'

This documentary explores the wild trajectory of the show, from Matt Groening's early underground cartoons to its status as a groundbreaking pop culture phenomenon.

Don Herbert, better known as 'Mr. Wizard,' was the predecessor to the 'Science Guy'

From 1951 to 1965, the former B-24 bomber pilot performed science experiments that home audiences could replicate on "Watch Mr. Wizard," inspiring about 50,000 Mr. Wizard Science Clubs throughout North America. Subsequent series, including "Mr. Wizard’s World" and "Teacher to Teacher with Mr. Wizard," ran on Nickelodeon until 1996.

A smooth, scrollable timeline of every 'SNL' cast member

Starting from season 1 in 1975, scroll through the years of the show's comic actors in this well-designed visual record and get a sense of their relative endurance on the show. Stop to click and read more on that season's highlights or the specific career arc of the actor.

The first cast members were relatively unknown 'enlightened amateurs'

“SNL” producers aimed to cast relative newcomers for the show’s first season, convinced that amateurs would infuse the show with the countercultural spirit Lorne Michaels envisioned.

The best celebrity cameos on 'The Simpsons'

As the show became a pop culture sensation in the late '80s, it began attracting celebrities eager to get in on the fun. This list ranks some of the best of those appearances, including Meryl Streep, Paul McCartney, and Dustin Hoffman.

'Sesame Street' scrapped an episode about divorce because tests showed it deeply upset children

The 1992 episode, entitled "Snuffy's Parents Get a Divorce," left test audiences concerned rather than comforted, with many children left in tears. The show canned the episode before it aired and didn't address divorce until 20 years later, with a 13-minute online-only segment.

Before 'SNL,' producer Lorne Michaels was a performer

Michaels was a costar on "The Hart and Lorne Terrific Hour," a popular show on the Canadian network CBC. As these clips show, it was a standard variety show, something Michaels would intentionally react against with "SNL."

Watch a medley of Pets.com commercials with the famous sock puppet mascot

Pets.com used a sock puppet decorated like a dog (operated by comedian Michael Ian Black) as the company's mascot. The sock puppet became synonymous with the brand. An auto lender company called BarNone Inc. later purchased the sock puppet for $125K and rebranded it with the slogan "Everybody deserves a second chance."

Steve Martin was vying for love on 'The Dating Game' before he was selling out arenas

In 1968, the 21-year-old Martin was a writer for the Smothers Brothers, who had a popular variety show. He appeared on “The Dating Game” as one of the bachelors, attempting to impress the twin sister of his childhood crush. (Spoiler: It worked.)

Walt Disney’s Laugh-O-Gram Studio featured his earliest innovations in animation

Before he founded his iconic film company, Walt Disney was a young animator in Kansas City, Missouri. After scoring a contract to create animated newsreels for local movie theaters, Disney formed Laugh-O-Gram Studio, where he created innovative animated shorts that set the path for his later work.

'Steamboat Willie' was the first film to feature Mickey Mouse

This short film introduced Mickey Mouse, the character who would define the Disney brand, to the world. It might be almost 100 years old, but you'll be surprised at how much humor still holds up.

In 2022, a Minneapolis news station stumbled upon footage of Prince as a child

A production manager at the city's CBS affiliate was looking through the archives for footage of a 1970 teacher strike when he noticed a young boy he believed was Prince. The newsroom worked to extract the audio and identify the childhood friends of the famous musician, who confirmed it was indeed him in the video.

Spinal Tap began as a sketch on a short-lived TV show

The fake band might be best known for "This is Spinal Tap," 1984 movie that effectively created the comedy mockumentary, but the premise began with an appearance on a short-lived ABC show called "The TV Show."

2 'Simpsons' producers break down the show's turning points

Longtime director David Silverman and showrunner Matt Selman walk you through some of the show's biggest turning points, from the early days on "The Tracey Ullman Show" through its biggest guest stars and eerily accurate predictions.

For 'Labyrinth,' the Jim Henson Company erected a 15-foot-tall character named Humongous, the largest puppet the company had ever built.

'Truth or Consequences' was the first TV quiz show

The game—which forced contestants who answered questions incorrectly to face "consequences" in the form of wacky stunts—debuted in 1941 with a one-off experimental broadcast on WNBT, then reappeared on NBC in 1950. In 1956, a fresh-faced Bob Barker made his television debut as the show's new host.

'SNL' began as a low-budget replacement for reruns of 'The Tonight Show'

Johnny Carson, host of "The Tonight Show," asked NBC to move his reruns to weeknights instead of weekends. That freed up a weekend slot and the network decided to try a new live show.

Mario's archnemesis hosted a children's show in the 1980s

"Super Mario Bros." grew so popular in the '80s, even King Koopa, the video game's villain, had his own television show, though it's been all but erased from TV history. There's good reason for that: It was a bizarre enterprise, featuring '30s cartoons, a grumpy stand-up comedian, and cheap production.

HBO premiered the modern stand-up special in 1975

When they appeared on TV, stand-ups were typically limited to five-minute spots on late-night talk shows, like "The Tonight Show." That changed with the fledgling HBO, which offered comics hourlong slots. The first was "An Evening with Robert Klein," a special that would define "the hour" for decades.

'SNL' was originally called 'NBC's Saturday Night'

Another show already owned the title: the short-lived "Saturday Night Live with Howard Cosell." The variety show only lasted one season and was widely panned, despite featuring several talented comedians—like Bill Murray, Christopher Guest, and Billy Crystal—who'd later be stars on "SNL" ... after officially changing its name.

Cookie Monster evolved from the Wheel Stealer, a monster obsessed with a wheel-shaped cheese snack.

Jackie "Moms" Mabley was the first woman to headline solo at the Apollo Theater

The comic's act was based on a classic archetype: the fed-up mother who was going to tell it to you straight. She perfected her craft on the Chitlin Circuit, where she became a cultural icon in the Black community, and then had significant mainstream success starting in the 1960s.

The first nationally broadcast soap opera was 'Clara, Lu, 'n Em'

The show first aired in Chicago in 1930, but was then picked up by NBC and broadcast across the country in 1931. The show followed three women who lived in the same duplex. Listen to a 1934 episode below, including the preshow's soap-centric advertising.

'I Love to Eat' was the first nationally televised cooking show

Beard’s show, cohosted with Julia Child, debuted in 1946. It was invaluable in setting the stage for today’s massive trove of televised and online cooking content.

Big Bird was almost included on the Challenger mission

As part of NASA's early outreach ideas tied to the Teacher in Space program, Sesame Street's Big Bird was briefly considered for a Challenger flight, but the plan was dropped because the oversized costume could not fit safely inside the shuttle.

Mel Brooks got his start in comedy by accidentally flubbing a scene in a play and turning it into a fourth-wall-breaking joke, something that would later become a hallmark of his humor.

Every ‘SNL’ host who's doubled as musical guest

This chronological list details every entertainer who’s both hosted and performed as musical guest through the show’s five decades. You’ll find some interesting tidbits, like Paul Simon breaking ground as the first to do it in 1975, and some serious headscratchers, like Garth Brooks performing as his alter ego Chris Gaines.