Because his farts create unpleasantness for everyone on a cruise ship, Walter the dog continues the journey in a lifeboat, but when the ship's computer crashes, causing the liner to drift, Walter again proves himself a hero.
Stinky and Stan have become full-fledged members of the Buzzards and are headed to Spruce Mountain for a camping trip! When the boys meet another "troop" looking to collect their own achievement patches, will Stinky and Stan be able to protect themselves?.
When an expert on animal gas tries to cure Walter, his farts keep building up until he floats away and is blown by the wind to a distant place, where he once again proves himself a hero.
Pinky Dinky Doo tells her little brother a story about a girl who passes gas in front of her classmates, but instead of revenge for the teasing, she invokes the Golden Rule.
The aliens on Uranus find Stinky & Stan's rocket and note, and decide to head to Earth to retrieve the famous farting brothers and bring them back to their planet, but when the boys realize that the aliens are up to no good they craft a getaway plan to return home.
After a field trip to the science museum, twins Stan and Stinky Grosse build a rocket for the Astronomy Fair in an attempt to beat Penelope and win first prize.