The untold truth of Adventure Time

Adventure Time has spanned eight seasons, countless comics, and soon, a major motion picture. It's easy to see why fans would instantly fall in love with these quirky characters and their strange, beautiful, and surreal world of Ooo. So, whether you are a lifelong fan of the adventures of Finn and Jake or if you're just curious what the buzz is all about, we've got the perfect guide for you.

It started with a song

It's almost impossible to discuss Adventure Time without discussing its music. At any given point, characters are likely to burst into songs that range from emotionally intense (such as Marceline's "I'm Just Your Problem") to bizarre and surreal (such as Finn and Jake's "political rap" created to rile up denizens of the Nightosphere). However, the most famous Adventure Time song would be the one that opens every single episode. The song is simple but full of whimsy and the promise of adventures and fun. It's the perfect encapsulation of the series … which is fitting because this song is how the series truly began.

When series creator Pendleton Ward went to pitch the first Adventure Time cartoon (an animated short), he brought in some more traditional pitching equipment, such as storyboards. However, he also brought along his guitar so that he could sing the opening theme song for the executives. They liked the song well enough to order the short, and the short's popularity snowballed into an order for the series that we know and love. For that series, Ward rerecorded the song using a ukulele instead of a guitar. It was meant to be a temporary recording to quickly submit to Cartoon Network (that's why careful listeners can hear typing in the background of the song, as it was recorded in a cramped room), but Ward fell in love with it and never agreed to replace it, despite later attempts at rerecording it.

Accidental apocalypse

Considering it's typically a funny cartoon with lighthearted characters, one of the oddest elements of Adventure Time is that it's explicitly a post-apocalyptic show. Over the course of many seasons, we piece together some of the events surrounding a Mushroom War that seemingly killed most of the humans, created mutations, and took a giant chunk out of the Earth. Considering all of this detail, it would certainly seem like the creators had a plan all along. But this post-apocalyptic setting came about completely by accident.

Early in the first season, the show was meant to be more of a straightforward fantasy series. This seemed clear with its emphasis on sword-wielding heroes, beautiful princesses, enchanted kingdoms, and so on. However, in one episode, the characters encounter some 21st-century businessmen that have been frozen in an iceberg. This was truly a game-changer, as it meant the world of Finn and Jake had once been very much like our own before it was irrevocably changed. Seeing that the die was now cast, the writers ran with the apocalyptic idea, crafting nuanced stories about how that time period was formative for both Marceline and the Ice King (characters who are functionally immortal). This setting adds an air of melancholy to even the most lighthearted episodes, but the setting would never have existed at all if the writers didn't think frozen businessmen would be a funny concept.

Marceline's father is voiced by her voice actor's father

Marcline morphed into a fan-favorite character after her earliest appearance. She originally served as a kind of antagonist for Finn and Jake but became their gothy, guitar-rocking older friend. Like many of the characters, she carries baggage from the past, and hers centers on daddy issues. Finn and Jake encounter her father, who turns out to be a kind of evil VIP: he is the ruler of the Nightosphere, which is Adventure Time's version of hell. To the voice actor for Marceline, he's a different kind of VIP: he is her father.

The voice actor for Marceline is Olivia Olson, and her adoptive father, Martin Olson, plays her onscreen father, Hunson Abadeer. The elder Olson is a veteran comedian, singer, and a writer for shows like Phineas and Ferb, but he seems to have taken a special liking to Adventure Time. In addition to playing as Abadeer, Martin Olson was the writer of the popular Adventure Time Encyclopedia. Later, he teamed up with Olivia Olson to write The Enchiridion & Marcy's Super Secret Scrapbook, which further fleshed out the interior life of Marceline and the impact that the departure of her father had on her.

Bubblegum and Marceline's relationship will never be explicit

One of the longest-running areas of discussion surrounding Adventure Time is whether Marceline the Vampire Queen and Princess Bubblegum were ever a couple in the past. This speculation kicked into high gear after the third season episode "What Was Missing." A mysterious creature steals personal items from different characters and then hides behind a door that can only be opened by a "song from a genuine band." The characters form an ersatz band, and veteran singer Marceline starts singing a breezy song about sucking the color off of Princess Bubblegum's face. When Bubblegum objects, Marceline launches into a song that sarcastically apologized for not treating Bubblegum like a goddess, asked if Marceline was not sweet enough for her, and proclaimed that Marceline shouldn't have to prove anything to her. The catchy song made it sound a lot like the two characters were once a couple, which seemed further verified when the item stolen from Princess Bubblegum turns out to be a T-shirt from Marceline that the princess sleeps in each night.

Fans wrote reams of fanfiction and fan art about this new pairing, which they dubbed "Bubbline." And the series continued dropping hints that almost but-not-quite confirmed the characters' romantic history. Because these were hints and not confirmation, debate about this forbidden love has been long and fierce. However, that debate seemingly ended when series creator Pendleton Ward asked Marceline voice actress Olivia Olson, "you know they dated, right?"

Olson was naturally curious as to whether they'd ever confirm this romance onscreen or in any official Adventure Time books. Ward said he wasn't sure about the books, but they'd likely never show it onscreen because in some of the countries that Adventure Time airs in, "It's sort of illegal." So the love between these characters will continue to be one that dares not speak its name.

Pendleton Ward identifies most with Lumpy Space Princess

In addition to creating and writing for the show, Pendleton Ward serves as the voice for the long-running, always-strange Lumpy Space Princess. This unconventional character is a constant outsider, having been kicked out of her parents' house in their dimension and later shunned by other princesses on Ooo. From time to time, the character lives homeless in the woods and stoops to terrorizing villagers for food when necessary. All of which makes it that much stranger that, during a New York City Comic Con panel, Ward admitted that he identifies very closely with this character, saying he was "embarrassed" at the degree to that he can relate to her.

Ward quickly turned the revelation comedic, but there's likely some pathos and depth to the idea of this creator (often characterized as quiet and shy) identifying closely with a character that's constantly ostracized, lonely, and misunderstood.

The Bill Murray connection

Adventure Time is steeped in pop culture, which isn't surprising considering one of the characters is a walking, talking Gameboy. One of the main characters, though, has a rather unexpected influence. According to Pendleton Ward, the character of Jake the Dog was inspired by Bill Murray's character Tripper in his sleepy, late-'70s comedy Meatballs.

In that movie, Murray plays a summer camp counselor who is a mentor to young visitors, including our protagonist Rudy. Even as Murray provides advice, he also keeps things real, such as a hilarious scene where, when asked to inspire the Camp about their upcoming competition against a well-heeled rival, instead leads a chant of "it just doesn't matter!" These elements are all in play with Jake the Dog, who plays an older, mentor role with Finn the Human but is still often goofy and refuses to take anything that seriously.

Pen the Human?

By now, Adventure Time fans are very familiar with the voice of Jeremy Shada, the actor who brings Finn the Human to life. However, we came close to getting an entirely different voice actor for the role: Jeremy's brother, Zack Shada.

Zack voiced the character in the Adventure Time pilot (back when the character was called "Pen" instead of "Finn" as a reference to creator Pendleton Ward), but by the time the show was becoming a full series three years later, Zack's voice had changed, and he could no longer convincingly portray a young, teenage Finn. His own younger brother, Jeremy, realizing that he sounded a lot like Zack once did, auditioned and got the role. Of course, Jeremy's own voice was destined to change, so the creators made the command decision to have the character age as the series goes on.

A snail is hidden in every episode

Animators and other creators are pretty notorious for sticking weird Easter eggs in their shows for obsessive fans to find. Pendleton Ward and his team did this on a very small scale, but they managed to do it obsessively: every episode of Adventure Time has a snail hidden in it, and that snail often waves to viewers. At times, the snail has taken a prominent role in the show, as when it became an unwitting vessel for the mind of The Lich, who was also able to speak through him.

Interestingly, the snail's "Easter egg" mechanic has continued into some of the show's merchandise, such as the official Adventure Time Munchkin spinoff. In that game, the snail is hidden on several cards, whereas other cards prompt players to immediately level up if they can find a snail hidden on the table in ten seconds or less.

The Ice King's eating disorder

The Ice King's most familiar appearance in the show is as an overweight wizard. Other times, though, he looks downright anorexic under his robes, as with a scene in which he shows his Penguin Gunter his reflection in a mirror and says the penguin is getting fat. In that same reflection, we can pretty much count the ribs on the Ice King, which makes it likely that he is reacting in an extreme way to the kind of mocking he is now passing on to his pet penguin.

There are other scenes where he is super-thin like this and still feels the need to work out, showing a sad and obsessive worry about his weight, which continues to fluctuate up and down throughout the series. Overall, Ice King's story is one tragedy after another: he loses his fiancee to the madness of the crown and later has to abandon a young Marceline for the same reason. Now, trapped in his mind, he is unable to find romantic love, and that inability drives him to either overeat or completely starve himself, all in a quest for happiness that will likely never come.