Fionna, Cake, and Simon get transported to the Time Room with Prismo and decide to talk to Prismo about how their worlds are connected, but a god auditor named Scarab has other plans for the trio in "Prismo the Wishmaster", aired 2 Years Ago. #AdventureTime #DayInFandomHistory

Cake crash-lands into a fantastic new world, the magical world of Ooo, while escaping from being sent to the vet, as Fionna continues her search for her missing cat after witnessing something impossible in "Cake the Cat", aired 3 Years Ago. #AdventureTime #DayInFandomHistory

Mordecai and Rigby use a magic keyboard to give them anything they want, but things take a turn for the worse when they accidentally use the keyboard to send everyone to the moon and must find a way to get back in "The Power", aired 16 Years Ago. #RegularShow #DayInFandomHistory

Long after the events of the last episode, just as life is resuming to normal, KO feels like moments of his own life seem to be slipping away and suspects something weird is going on in “Thank You for Watching the Show”, aired 7 Years Ago. #OKKOLetsBeHeroes #DayInFandomHistory

When a fighting tournament was announced at the Plaza, the stakes had never been higher, with everything on the line for Rad and Enid to save KO and stop Venomous from getting a wish as the prize in “Let’s Fight to the End”, aired 7 Years Ago. #OKKOLetsBeHeroes #DayInFandomHistory

Dendy takes over KO's video channel and tries to shed some light on everything that has been going on with the Plaza in turmoil, thanks in part to TKO and Shadowy Venomous, after the last episode in “Dendy’s Video Channel”, aired 7 Years Ago. #OKKOLetsBeHeroes #DayInFandomHistory

At Clara's request, The Doctor takes her to 12th Century England where they meet Robin Hood, only for him to think that the legend is all made up, and face off against the Sheriff and his army of...robots? In "Robot of Sherwood", aired 12 Years Ago. #DoctorWho #DayInFandomHistory

Archer, Lana, and the Agency's newest member, Zara, travel to England to stop a thief who is getting away with stolen artifacts that happen to be cursed and curse anyone who gets their hands on them in "Plaque Removal", aired 3 Years Ago. #Archer #ArcherFXX #DayInFandomHistory

A major knife storm causes Finn and Jake to spend their day indoors and locked down in the treehouse, where Jake's imagination has gone totally out of control, and the duo must find a way to stop it in "Rainy Day Daydream", aired 16 Years Ago. #AdventureTime #DayInFandomHistory

The Bears reunite with their old pet, Captain Craboo, and when a meet-up with Nom Nom goes wrong, the trio fears they could be separated from the crab and go on the run in hopes of saving their friend in "Captain Craboo", aired 10 Years Ago. #WeBareBears #DayInFandomHistory

Rick's time with the crows and living in his own adventure gets cut short when he comes across a middle-aged Morty hoping to reconnect with him, leading down an emotional path in a familiar location in "Rickmurai Jack", aired 5 Years Ago. #RickAndMorty #DayInFandomHistory

A fallout between Rick and Morty after Morty uses the portal gun causes Rick to find a new sidekick, with a pair of crows filling Morty's spot, and Morty making a new friend through his hand in "Forgetting Sarick Mortshall", aired 5 Years Ago. #RickAndMorty #DayInFandomHistory

In a gender-swapped version of the series, Fionna saves Prince Gumball from the Ice Queen and later hangs out with him, which leads to him asking her out with the help of Cake, who gives Fionna some advice about boys in "Fionna and Cake", aired 15 Years Ago. #AdventureTime #DayInFandomHistory

Tired of hearing noise at the theaters, right as they begin to file a complaint, the Bears get hired to become the silent police, dressed up as ninjas, to end the noise during every movie screening in "Shush Ninjas", aired 11 Years Ago. #WeBareBears #DayInFandomHistory

Tired of getting a lame birthday gift for Mordecai every year, Rigby decides to up the ante and wants to find the perfect gift for his friend- or rather, make one with the help of an out-of-nowhere programmer in "Birthday Gift", aired 11 Years Ago. #RegularShow #DayInFandomHistory

Mordecai and Margaret finally kiss, but when Mordecai is left disappointed after it was cut short by his bad breath, he wants to go back in time to redo it and prevent a possible repeat of his bad breath in "Bad Kiss", aired 14 Years Ago. #RegularShow #DayInFandomHistory

The Doctor, Amy, and Rory answer a distress call from a little boy named George, who is afraid of what he thinks are monsters hiding in his cupboard, but are the monsters real? Or are they all just imaginary? In "Night Terrors", aired 15 Years Ago. #DoctorWho #DayInFandomHistory

The fate of Ooo is laid out in two adventures in the distant future from Bubblegum gathering her allies as Finn and Jake must stop the war from brewing to an unspeakable being coming down from the skies in “Come Along With Me”, aired 8 Years Ago. #AdventureTime #DayInFandomHistory

Finn and Jake, when noticing that everyone is having trouble beating an unwinnable foe, decide to take him on, but the duo is faced with a disagreement, with Finn wanting to train while Jake wants to slack off in "Who Will Win", aired 14 Years Ago. #AdventureTime #DayInFandomHistory