The gang faces warfare to deliver a letter to a house that never gets mail.

Patrick's anxiety rises when the cloud appears to the source of nightly thundering.

Angus accidentally throws Burt away.

Angus takes a day off, but Parker thinks 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 who is looking for gold.

When Parker finds mysterious love letters written by Angus, the little nimbus goes all over town to find who they're meant for.

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 makes snow cones 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.

When Santa gets injured during a stop on Mt. Middlemost, Parker, Angus, and Russell help finish his deliveries.

Parker learns that the mail drone, which was thought to have been destroyed, returns for revenge.

Parker has a sleepover for the first time.

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 that doesn't like him.

Parker becomes overly obsessed with a game.

Parker meets new people during a family holiday with Angus and Russell.

Angus and Parker take part in a toast competition organized by Miss Pam.

When a hot air balloonist crash lands into the Steadfast, the Middlemost Post goes on a journey to help her.

After winning a raffle, Parker comes into a large sum of money, which Angus warns will come at a cost.

The Middlemost Post discover a secret backyard wrestling league that challenges both their skills and egos.

Parker tends to a small strawberry garden until its survival is threatened by a horde of ravenous birds.

Parker discovers Angus can't swim, but with the little nimbus' help, the sailor's on his way to becoming a buoy!

Parker picks up a bunch of side hustles in order to afford the perfect gift for Angus.

Parker believes Burt can speak via popping bubble wrap, and pretty soon, the whole mountain seeks Burt's wisdom.

Never having made it to dark, the Middlemost Post decide their latest camping trip will finally be the one.

Bud and Buddy return to the mountain, claiming they're reformed leprechauns no longer seeking Parker's gold.

Parker makes the Yellow Springs soccer team, which thrills Angus since he never had the chance to play growing up.

Parker brings home a hamster the Middlemost Post falls in love with, but this love quickly turns to jealousy.

As Mayor Peeve announces his re-election campaign, Ariel returns to the mountain and runs against him for mayor.

Parker meets Mt. Middlemost's resident daredevil, who hung up his cape after an extreme jump went wrong.

Ms. Pam creates a sentient jar of jam who wins the hearts and minds of all who dine at the Middlemost Toast.

When multiple packages are found smushed, the Middlemost Post must discover the truth and clear their name.

Parker wakes up one morning with Tie-Dye Eye, and pretty soon, so does the entire mountain.

On Lily's birthday, Parker gifts her a homemade cardboard suit, but it can't measure up to her mech suit.

The Middlemost Post receives a mysterious trinket in the mail, which they come to believe brings bad luck.

When Santa shows up for summer vacation, Angus is conveniently injured and needs Santa to deliver the mail.

Parker wants to help Lily's sisters plan her Wing Ding, but it's clear the little nimbus doesn't quite fit in.

Russell's newly budding romance is threatened by an overprotective Blubergian.

After getting stranded in the Yellow Springs desert, Parker and Lily's friendship is put to the test.

After Jelly goes missing, Parker and Lily volunteer to help Ms. Pam find her.

After accidentally swallowing an irreplaceable Shackleton family stamp, Parker goes inside Angus to retrieve it.

It's Halloween night once again as the Middlemost Post share scary stories with the help of a few friends.