Osmo's arrival gets stranger when he befriends a yellow yeti called Gustav. His amateur monsterologist cousin Rita su...

Osmo and Rita's first family dinner goes badly, jeopardising Osmo's stay in Winterton. Gustav must save the day in a ...

When Osmo has to get a skiing license or be banished, becomes his clueless ski instructor and Rita pits him Mayor Chr...

When monster panic strikes Winterton, Gustav volunteers as a stand-in yeti for Mayor Chrome's monster-preparedness dr...

When Gustav thinks his Grampapa has been turned into Chrome's new rug, the kids help give him a send-off at Monster G...

When Osmo's inflatable doughnut goes missing with everyone's mail, the trio search for Winterton's Mail Cats, who hav...

When Ned thinks Osmo needs company, he gets him a cute pet which turns out to be a vicious monster. Osmo and Gustav m...

Rita finds proof that her hero, Emma Erton, was the true founder of Winterton, but loses it to Anders and his cronies...

When Osmo and Rita suspect Gustav is going 'full monster', they trap him so they can find a cure, only to get symptom...

A lake monster cozies up to Gustav in the belief that he wants to take her out for dinner, with Osmo and Rita as the ...

When Osmo's eagerness to fit in by celebrating Winterton's founding leads to disaster, he must use his wits as an out...

When Gustav plucks a legendary plunger from the town toilet, he thinks he's Winterton's one true plumber, leaving Ned...

When Osmo signs Winterton up to host the Winter Games, Chrome is caught unprepared. The trio must rally the town to p...

When Osmo discovers a monster who looks just like him, he teaches him how to have fun, only for his clone to cause ch...

When Rita competes with Osmo and Gustav against Anders' crew in a sauna competition, her competitive side emerges. Os...

When Spring doesn't come, the townsfolk begin acting strangely. It's up to Gustav to perform various ridiculous deeds...

When Rita takes her mom's secret amulet, the trio experience bad luck and suspect that Lydia may be a monster. They m...

When Osmo, Rita, and Gustav get trapped in a gondola, their friendship is tested by panic and paranoia, while Chrome ...

The trio's scheme to bring online delivery to Winterton is a huge success, but when they drive Mr. Cavity's shop out ...

When Gustav is mistaken for a giant teddy yeti by Anders' spoiled little sister, Osmo must break him out of their hou...

When Rita's talent for chainsaw ice sculpting goes from scary to awe-inspiring, Osmo and Gustav investigate if it's r...

It's Osmo's worst nightmare when he gets stuck to Anders with pinesap on a field trip, and both wind up lost on Monst...

When Rita replaces Chrome with Gustav as mayor, it's all good fun until chaos befalls Winterton. The trio must work w...

When Mayor Chrome forgets his wedding anniversary, Rita and Osmo pull out all the stops to keep her parents together,...

The kids help Gustav dress up for the Ball, only for the yeti to be crowned belle for a whole year. Now they must hel...

When Chrome puts Winterton on an all-beet diet, Rita rebels by supplying townsfolk with Monster Fizz Dipper on the sl...

When Chrome seizes Osmo's snowboard, he calls up Gustav's monster-burglar pal, Geddin, to help him get it back, only ...

Osmo and Gustav get jobs as delivery guys to raise funds to celebrate Rita's graduation from Anger Management class, ...

Osmo kitten-sits for Katz in a hostage deal for his beloved childhood plushie, but when the kitten goes missing he en...

After Osmo dodges an awkward talk by accidentally freezing Ned in ice, he must take his place as Winterton's plumber,...

When Gustav boasts to Osmo and Rita about visiting a patch of forbidden Rainbow Snow atop Monster Mountain, he regret...

When Osmo and Rita visit Gustav's family, they're forced to keep his life among humans a secret while dodging Grampap...

When Osmo, Rita, and Gustav do a good deed for old man Ukko, he tempts them with tales of his fortune, leading them t...

Osmo and Rita join Gustav to celebrate his ancestors at the Monster Graveyard, only to wake them up by sharing spooky...

When Gustav discovers Future Gustav is alone and friendless, he goes overboard to protect Osmo and Rita, only to lead...

Rita swaps homes with a monster girl named Emmer for Monsterology research, but when Emmer wants Rita's life in Winte...

When Rita rescues a sapling, Osmo and Gustav's fertilizer turns it into a giant monster tree. Rita wants it to stay r...

When Osmo insults a weasel, he ignites a war between weasel-dom and Winterton. Osmo must find a way to apologise befo...

When Gustav, Osmo and Rita get locked in the Town Hall with Rufus, paranoia causes all four to suspect each other of ...

When Osmo and Rita ruin Gustav's heirloom monsterdough recipe, he guilts them into a quest up Monster Mountain to rec...

When Rita seeks Ukko's guidance to go with her gut instead of her brain, Osmo and Gustav suddenly forget how to have ...

When Rita's mom goes on a secret trip, Osmo and Gustav help Rita find the truth about her monstrous past, only to fin...

When Gustav's monsterbread bursts and makes all of Winterton lose their memory - he, Osmo, Rita and Rufus think they'...

When Gustav tries to track a beet-stealing Wolverine, he shuffles through all his personas to outsmart it, in vain. O...

When Gustav becomes Winterton's Winter Games mascot, he enjoys walking around undisguised, but soon suffers under the...

When Rita gets growing pains, Lydia helps get her worries off her chest with a romp on Monster Mountain, while Chrome...

When Osmo digs through Chrome's rule book, he discovers a hidden rule that could banish him or Chrome from Winterton....

Rita tries to give her dad the toy of his boyhood dreams to cheer him up, but gets conned out of her home by Mr. Cavi...

When Rita and Osmo discover that Gustav is not allergic to singing, but can sing too, they enter him into the Winterv...

Osmo, Rita, and Gustav must convince all monsters that they're immune to the Chromatron's yodels. Getting them to sin...