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; 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 over thunder.

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.