While delivering a letter to a house that never gets mail, the gang goes through warfare to get to its front door. Parker does the chores in an attempt to be more like Angus and comes to realize that they're actually boring.
When Angus accidentally throws Burt away, he and Parker must get him back from Greenwood's Recycle King. After Angus tells Parker and Russell to leave the house on his day off, Parker wrongly assumes it's permanent.
Angus agrees to compete against Mayor Peeve's new POSTBOT in a mail-off to save the Middlemost Post. Parker's anxiety escalates when the cloud appears to be the source of loud nightly thundering plaguing the town.
After one of Lily's inventions goes haywire, she enlists Parker's help to get it back under control. Angus loses his lucky beanie, which causes him to revert back to being a child.
Parker accidentally loses one of Russell's teeth and hurries to find a replacement before Angus finds out. On Free Toast Day at the Middlemost Toast, Parker does whatever it takes to make sure Angus enjoys the holiday.
Parker's new friend turns out to be a Leprechaun in pursuit of the gold at the end of Parker's rainbow. When Parker finds mysterious love letters written by Angus, the little nimbus goes all over town to find who they're meant for.
Parker makes snowcones for everybody in town and learns that saying 'no' isn't always a bad thing. Parker and Angus make a delivery to a spooky old woman in the Middlemost Forest - who might be a witch.
Parker has a sleepover for the first time and enlists Angus's help to make it as fun as possible. Parker and Angus go the distance to try and give Russell a bath before her stench becomes destructive.
Angus tries to woo the only dog on the mountain that doesn't like him: Jelly. Parker becomes overly obsessed with a game to the point where the little nimbus isn't a cloud anymore.
Parker makes some bougie new friends while the Middlemost Post is on vacation. Angus and Parker compete in a toast-making contest hosted by Ms. Pam and The Middlemost Toast.
When a hot air balloonist crash lands into the Steadfast, the Middlemost Post goes on a journey to help her fix it. When Parker gives shelter to a spider during a blizzard on the mountain, the cloud learns of Angus's deathly spider fear and tries to rid him of it.
After delivering mail in Purpleton, the gang finds a Baby Reggie stowaway that Parker insists on returning home. When a famous Rapper visits the Mountain, Parker gives him a new zest for life.
After receiving the Middlemost Post's "Cloud of the Month" award, Parker gets a big head about the new title. After clogging the bathtub, Parker calls a plumber-that winds up being Ryan in disguise-to fix the problem.
On Halloween, the Middlemost Post crew tell each other scary stories to get through a blackout on the ship. Mayor Peeve and the Middlemost Post compete with rival pumpkins in an annual pumpkin pageant.
Parker learns that the mail Drone the cloud accidentally destroyed has come back for revenge. Parker, Lily, and Mayor Peeve team up to stop the zombie mail Drone once and for all.
Parker tries to cheer up the grouchiest woman on Mt. Middlemost, Dolores Moody. Parker, Angus, and Russell must save the S.S. Steadfast from a pirate hijacking.
Parker finds a body hair, and the cloud assumes it's time to become an adult. During a trip to the dentist, Parker remembers how the S.S. Steadfast got shipwrecked on Mt. Middlemost.
