Stinky and Dirty must clear snow from train tracks and unplug a clogged tunnel so Fast can deliver Christmas trees and ornaments for the Go City town square; Stinky and Dirty find a crashed sleigh filled with presents on Christmas morning.
Stinky and Dirty call Sweepy to help clean up after Go City's Carnival; Stinky and Dirty drive down a spooky "broken road" and discover a monster is a friendly monster truck.
Dirty and Stinky dig up a tree targeted to be cut down and replant it; Stinky and Dirty must figure out how to transport a spire that is set to go on top of McMullan Tower.
When Stinky loses his voice, he uses gestures to communicate directions to Dirty and they build a helicopter pad together; when Sweepy can't stop his brushes, he accidentally sweeps up objects not meant to be swept.
When a traffic light breaks and remains red, Stinky and Dirty find a way to get traffic through it; when Haul accidentally spills the contents of a shipping container, Stinky and Dirty help him find the missing cargo.
Tall needs to lift a giant roller coaster into place, but he can't get the laughter he needs to lift it; Stinky and Dirty get locked in a parking garage and can't find their way out.
Unloading a giant garbage barge is Stinky's dream come true -- until he accidentally cuts the anchor and it drifts down the river; Stinky and Dirty must retrieve a giant tire parade balloon that is floating away.
Stinky and Dirty try to clean the new drive-in movie screen, but they make it worse; Stinky and Dirty can't find a good parking spot at the drive-in and miss the movie searching for one.
When Fast gets stuck in reverse, Stinky and Dirty try to help him go forward; after going through the car wash, Stinky no longer smells like himself and must find a way to get back his unique "stink."
Stinky and Dirty want to give Sender a singing valentine, but they have to find Sender first; Stinky and Dirty help the grounded Chopper by showing his Valentine's Day banner so all of Go City's residents can see it.
Stinky and Dirty are enlisted to take the photo for a billboard advertising Go City, but capturing a moment in time is harder than they imagined; Zoom wants to meet Fast, so Stinky and Dirty try to build a track to facilitate their friendship.
When construction makes Cookie the Food Truck's usual lunchtime location unusable, Dirty and Stinky set out to find him a new parking spot; Red needs a place to rest, and Stinky invites her to park overnight at the dump.
All systems are go for the Space Shuttle to launch from Go City carrying the space trash-collecting rover, but when Rover escapes it's up to Stinky and Dirty to bring him back to the launchpad.
Stinky and Dirty find the biggest melon ever grown and can't wait to play Melon Splat, but it won't break and splat no matter what they do; when a buoy named Ding goes missing, another buoy needs Stinky and Dirty's help to find his pal.
When Stinky and Dirty get caught in a slow-moving traffic jam with crabby cars and trucks, they use resourcefulness to cheer themselves up and end up making the best of a bad situation; Stinky and Dirty try to stay up late for a monster truck show.
Stinky and Dirty are tasked with bringing a list of items to the construction site, but remembering the list is harder than they thought; Dirty enlists Stinky to help him and his construction crew clean up the messy construction site.