When a reformed raincloud teams up with a shipwrecked sea-postman and a magic walrus, the three form the Middlemost Post — the wackiest and most loveable postal service on Mt. Middlemost.
Episode 1
The gang faces warfare to deliver a letter to a house that never gets mail.
Episode 2
Patrick's anxiety rises when the cloud appears to the source of nightly thundering.
Episode 3
Angus accidentally throws Burt away.
Episode 4
Angus takes a day off, but Parker thinks it's permanent.
Episode 5
Angus agrees to compete against Mayor Peeve's new POSTBOT in a mail-off to save the Middlemost Post.
Episode 6
Parker's anxiety escalates when the cloud appears to be the source of loud nightly thundering plaguing the town.
Episode 7
After one of Lily's inventions goes haywire, she enlists Parker's help to get it back under control.
Episode 8
Angus loses his lucky beanie, which causes him to revert back to being a child.
Episode 9
Parker accidentally loses one of Russell's teeth and hurries to find a replacement before Angus finds out.
Episode 10
On Free Toast Day at the Middlemost Toast, Parker does whatever it takes to make sure Angus enjoys the holiday.
Episode 11
Parker's new friend turns out to be a leprechaun who is looking for gold.
Episode 12
When Parker finds mysterious love letters written by Angus, the little nimbus goes all over town to find who they're meant for.
Episode 13
On Halloween, the Middlemost Post crew tell each other scary stories to get through a blackout on the ship.
Episode 14
Mayor Peeve and the Middlemost Post compete with rival pumpkins in an annual pumpkin pageant.
Episode 15
Parker makes snow cones for everybody in town and learns that saying no isn't always a bad thing.
Episode 16
Parker and Angus make a delivery to a spooky old woman in the Middlemost Forest who might be a witch.
Episode 17
When Santa gets injured during a stop on Mt. Middlemost, Parker, Angus, and Russell help finish his deliveries.
Episode 18
Parker learns that the mail drone, which was thought to have been destroyed, returns for revenge.
Episode 19
Parker has a sleepover for the first time.
Episode 20
Parker and Angus go the distance to try and give Russell a bath before her stench becomes destructive.
Episode 21
Angus tries to woo the only dog that doesn't like him.
Episode 22
Parker becomes overly obsessed with a game.
Episode 23
Parker meets new people during a family holiday with Angus and Russell.
Episode 24
Angus and Parker take part in a toast competition organized by Miss Pam.
Episode 25
When a hot air balloonist crash lands into the Steadfast, the Middlemost Post goes on a journey to help her.
Episode 26
When Parker gives shelter to a spider during a blizzard on the mountain, the cloud learns of Angus' spider fear.
Episode 27
After a delivery round in Purpleton, the postmen find a stowaway: Baby Reggie. Parker feels desperate and wants to bring him home.
Episode 28
When a famous rapper comes to Middlemost, Parker gives him a new lease on life.
Episode 29
After winning the Middlemost Post's Cloud of the Month award, Parker begins to get into it.
Episode 30
Parker calls a plumber when the toilet is clogged, but it is Ryan who dresses up to solve the problem.
Episode 31
Parker tries to cheer up the grouchiest woman on Mt. Middlemost - Dolores Moody.
Episode 32
Parker, Angus, and Russell must save the S.S. Steadfast from being taken by pirates.
Episode 33
Parker must save Angus from rapidly aging inside Russell's belly.
Episode 34
Parker and Lily go on a quest through Old Stinkhole to rescue Angus.
Episode 35
Parker finds a body hair, and the cloud assumes it's time to become an adult!
Episode 36
During a trip to the dentist, Parker remembers how the S.S. Steadfast got shipwrecked on Mt. Middlemost.
Episode 37
Parker becomes obsessed with ranch dressing.
Episode 38
When a malevolent Smog Cloud terrorizes Mt. Middlemost, it's up to Parker to stop it.
