When someone has their favorite show, it can feel like they know absolutely everything there is to know about it. They know the classic moments that everyone quotes. They know all the guest stars. They even know all about the characters outside of the show; what other shows and movies they were in; to whom they were dating or married. It seems like they're a regular encyclopedia of knowledge all about the show. But as good as this person might be, we bet there are some tidbits of trivia in this article that they don't know about their favorite show. Only 10 percent of readers can guess all this classic show trivia. Get the skinny on behind-the-scenes trivia from The Brady Bunch, All in the Family, Seinfeld, The X-Files, I Love Lucy, The Simpsons, and many more shows. If you know any classic show trivia from past decades, be sure to let us know in the comments. Don't forget to SHARE this trivia with your friends!

The Munsters was one of the greatest hit shows of the 50s and 60s, and the family still remains iconic decades after the first episode aired. Their family car, too, is still widely recognized as one of the spookiest sets of wheels in TV history. What you might not realize about the Munster Koach is that famous automaker George Barris was the one who made it. Barris is most famous for making the Batmobile. The fans loved the Munster Koach so much, a second car was ordered for the actor who played Grandpa Munster. The second car had its own cult of major fans, including Grandpa Munster himself. He nicknamed it the “Drag-U-La,” a name that would later be used as the title to one of Rob Zombie’s greatest hit songs.

Another classic retro TV show that remains popular today is The Brady Bunch, and it was notorious for having problems on set. Between the behind-the-scenes drama of the actors and problems with writers, being a part of this show often meant having serious struggles on a daily basis. One of the biggest issues, believe it or not, dealt with hair. Producers wanted the children’s hair to match their parents. This required regular hair dye sessions, especially for Cindy Brady actress Susan Olson. Her hair was too dark, so they regularly had to bleach it. At one point, the bleach routine was so intense, she started to lose hair.

Family Matters was one of the most popular sitcoms of the 90s, with much of the credit going to Jaleel White—also known as Steven Urkel. White was known for dealing with a lot of restrictions, including a ban on exercise while he played his part as Urkel. Most Family Matters fans will be shocked to hear that Jaleel White almost wasn’t Steve Urkel. At the time, he almost turned down the role in order to join the Huxtable clan on The Cosby Show. Had he done that, it’s likely Family Matters would never have been as successful as it was.

Will Smith was a fairly successful rapper before his time on The Fresh Prince of Bel-Air, and he made millions during that time. Unfortunately, Smith made the mistake of splurging on jewelry and fancy cars while forgetting to pay his taxes on his massive earnings. He actually was very reluctant to join the cast. The only reason that he did was because of the dues he had to pay to the IRS. The show was a success, but Will Smith himself only saw a small portion of his paychecks from the series. Even so, the show was the reason why he narrowly escaped the IRS’s wrath.

The Simpsons became one of the most iconic American TV families of all time, and that led to global syndication. In most countries, people still recognize Homer, Marge, Lisa, Bart, and Maggie Simpson. In most cases, the only thing that changed was the language that they spoke on screen. Arabic television station MBC decided to give the Simpson family an Arabic makeover, calling them The Shamsoons. Homer became Omar. His love of beer turned into a love of fizzy drinks. Lisa became Bessa, and Bart became Badr. Moe’s Tavern? Yep, didn’t exist. Because the show was so heavily edited, it lost its flavor and eventually was pulled off the air.

I Love Lucy is a television show known for realistic dialogue, characters that honestly seem to love one another, and tons of good, clean laughs. It was what made the show so wonderful. That being said, the actors behind it were some of the most talented to ever hit the small screen. Along with memorizing each line before the live show, the actors also were excellent at hiding behind-the-scenes drama. More specifically, Vivian Vance and William Frawley who had to grin and bear each other’s company. The two absolutely hated each other off set!

Most fans of That 70’s Show already know that Mila Kunis lied about her age to get the part. At the time, she was only 15 and producers wanted someone who was older. She lied, and ended up kickstarting her acting career. Her super young age also led to some pretty major milestones on the show. Her first kiss was actually caught on camera, and it was with Ashton Kutcher. The two would later go on to date and marry.

Ed O’Neill made himself a household name after he was cast as Al in Married...With Children. His frumpy, mildly depressed character was one of the most hilarious (and relatable) on the show. O’Neill’s character quickly had him typecast to the point that he wasn’t really hirable for anything other than his role of Al Bundy. At one point, he starred in a movie involving a dramatic military court martial. His career faltered after audiences immediately burst into laughter, recognizing him as Al Bundy rather than a worried military official. Even when it came to his star on the Hollywood Walk of Fame, O’Neill’s addition featured him standing outside of a shoe store—an obvious tribute to Al Bundy’s job.

Star Trek is known for two main captains: Picard and Kirk. But, before either of those two space captains gained their fame, there was an earlier starship captain that helped lay the foundation of the iconic series. In the pilot episode, a man by the name of Captain Pike was behind the ship’s helm. After the pilot was revamped, they switched Pike with Captain Kirk. Pike was later added back into the series as Kirk’s superior. So, maybe he just got a promotion.

With its stellar cast and awesome location, you’d think that Cheers was an easy-to-produce shoot. For the most part, it was. However, there was one major drawback to shooting so many scenes with beer that might surprise audiences. Due to the heat of studio lighting, regular beer didn’t keep its froth well. To keeping the drinks looking crisp and fresh, drinkers had to guzzle “Near Beer,” which had a 3.2 alcohol by volume, plus a pinch of salt to keep the foam steady.

For most TV fans, it’s hard to imagine the show Friends without hearing people belt out, “I’ll be there for you.” That hit track was produced by The Rembrandts, and became synonymous with the show’s lovable cast and epic sitcom moments. It’s hard to imagine, but prior to the show’s airing, producers almost chose a different theme song. R.E.M’s “Shiny, Happy People” was inches away from being the show’s theme song. At the last moment, producers changed their minds and made The Rembrandts a household name.

Saturday Night Live has a lot of segments that became famous, but few were as popular as Jack Handey’s “Deep Thoughts.” This segment involved hilarious, often stoner-esque thoughts being read aloud to new age music. Most people assume Jack Handey is not a real person, but that’s not true. He was a writer on the SNL crew. Since his time writing the segment, Handey has published several books filled with deep thoughts and enjoyed serious success in the comedy sector.

The Simpsons is famous for having occasional crossovers with other FOX shows, including ones like Futurama and Family Guy. King of the Hill, on the other hand, is basically set it its own little universe with no other outside animated characters being introduced aside from guest stars. Or is it? As it turns out, there were some crossovers on King of the Hill you might have missed. In one episode, a Bart Simpson doll can be seen on Bobby Hill’s bookshelf. A Simpsons episode also shows the cast of King of the Hill drawn in on a couch gag. Shocking, isn’t it?

Rod Serling’s fame for being the man behind The Twilight Zone is cemented in history. His writing put science fiction on the map and made audiences rethink what they knew about sci-fi. For a while, his name was golden throughout most of Tinseltown. Sadly, The Twilight Zone ended up being his career peak. After his initial success, one bad choice led to another. Eventually, he ended up taking low quality gigs and was eventually branded a sellout by others.

Everyone who has grown up in the United States remembers watching Scooby-Doo, Where Are You? The gang of "meddling" kids has been a mainstay in cartooning since the early 60s, and little has changed since its pilot airing. Heck, the voice of Fred is still played by Frank Welker, who took the role over 50 years ago. Believe it or not, one of the notably few changes on the Scooby-Doo crew actually had a semi-political reason. Casey Kasem, who voiced Shaggy for years, left the show because he was vegan. After being asked to voice Shaggy in a Burger King commercial, he walked away from the job. Producers ended up relenting in 2002, when they decided to turn Shaggy into a vegetarian. He rejoined the show.

One of the most hyped TV pairings of all time had to be Arthur Fonzarelli and daredevil beauty, Pinky Tuscadero. It was a match that just seemed to make sense, especially considering how the Fonz was pretty much meant to be the epitome of cool. So, what could go wrong with giving him an equally rebellious love interest? Well, fans might have noticed that Pinky didn’t really last too long on the show. Roz Kelly, who was the actress behind Pinky, was notorious for having a very abrasive personality. After multiple arguments with cast members, Pinky’s role was quietly reduced until she vanished altogether.

Gilligan’s Island was a lighthearted comedy about a bunch of travelers who got way more than they bargained for after going on a three-hour tour. It seems so simple, right? Well, not quite. The writers behind Gilligan’s Island have a far deeper, almost darker meaning behind the story and characters. Originally, Gilligan’s Island was supposed to be a metaphor for world politics. It was lampooning the way Americans viewed world politics, even going so far as to point out that everyone can get along, but only if survival was the primary goal.

When it comes to characters in the Seth MacFarlane universe, Lois Griffin might just be the most famous redhead of all. The Family Guy matriarch might be recognized for her red hair right now, but things were almost very different. In the pilot episode, Lois Griffin was blonde. The show changed her hair to red in order to ensure she looked different from all the other characters. However, that doesn’t mean there weren’t any holdovers from blonde Lois. Chris Griffin, her son, still has his sandy-hued locks as a relic of Lois’s original color.

Seinfeld’s “Soup Nazi” episode is one of the most recognized episodes from the entire series, and that’s saying something! Most people laugh about the idea of a person acting like a “soup Nazi,” even going so far as to deride it as impossible. Surprise! The Soup Nazi episode was actually based on a real person called Ali Yeganeh, who owned a restaurant visited by Jerry Seinfeld. When Seinfeld visited after the show aired, Yeganeh flipped out and started screaming at him. Seinfeld gave a massively insincere apology, right before he was ejected from the premises.

In The Jeffersons, everyone’s favorite couple to “move on up” had a lovable neighbor by the name of Harry Bentley, played by Paul Benedict. Bentley’s appearance was recognizable for his strange features, including an oversized nose, large hands, and feet. Benedict had a rare syndrome known as acromegaly. A fan diagnosed it after watching him perform in a play in Boston. The fan was, in fact, a radiologist who recognized the features as a symptom of the disease. Prior to his work on The Jeffersons, Benedict made a point of going to an endocrinologist to get himself treated. The syndrome was halted just in time to avoid further damage.

The X-Files starred two government agents, Mulder and Scully. Agent Mulder was notorious for being a believer of the paranormal, while his daring female coworker acted as a staunch skeptic. This wasn’t a fluke. Creator Chris Carter did this as a way to help break through stereotypes people had about believers. The reality behind the actors’ beliefs are a little different, though. In real life, actress Gillian Anderson is the believer, while David Duchovny is a skeptic.

The Odd Couple was a show that really, truly had a relatable basis: two friends who were polar opposites that had to deal with living together. It’s a story that anyone who had roommates can empathize with, but that doesn’t mean there weren’t issues surrounding the show. Many fans were curious about the duo’s sexuality, which at times seemed a little eyebrow-raising for the era. Believe it or not, the show’s writers made a point of emphasizing that they were not gay. The original tagline asking if “two divorced men” could avoid driving each other crazy was the studio’s way of reassuring watchers that the two were straight as an arrow.

Jessica Fletcher’s hometown of Cabot Cove, Maine in Murder, She Wrote was known for having a lot of serious murders occur. Who else could solve the murders other than a retired schoolteacher who became a murder mystery writer, right? The BBC reported that Cabot Cove had a murder rate of around 5.3 murders per year. This doesn’t sound like much, but when you scale that up to a regular city’s population, you end up with 1,490 murders per million people. That beats out Los Angeles and Honduras! That wild number would make anyone think twice about visiting that little Maine village.

Everyone knows Kermit the Frog as one of the most well-liked muppets on The Muppet Show. Often passive and a little awkward, it’s hard to imagine this little green frog being anything but a little goofy toward his peers. Believe it or not, his predecessor wasn’t that kind-hearted, and no, we’re not just talking about the more adult episodes of ‘70s Muppet Show era, either. Prior to doing television shows, Jim Henson had a brown-colored predecessor to Kermit that was a little psychotic. This puppet was used to hawk Wilkins Coffee brand, and would often torture his victims for not drinking the right coffee brand. Yikes!

Fran Drescher won the hearts of everyone as Nanny Fran in The Nanny. The ultra stylish nanny from Flushing, Queens drove the plot forward with her search for love. Believe it or not, there may have been a couple of scenes where Nanny Fran’s lovelorn behavior wasn’t all an act. As The Nanny filmed, Drescher’s real-life marriage to Peter Marc Jacobsen started to deteriorate. They divorced in 1999, with Jacobsen revealing that he was gay all along. Drescher was stunned, noting, “We had good sex. We had a very normal marriage.”