Sheen launches himself into outer space and crash lands on the planet Zeenu. The Emperor and his daughter Oom takes an instant liking to Sheen but the Supreme Royal Adviser Dorkus wants to get rid of him after he destroys his house and usurps his influence over the Emperor. In the meantime Sheen meets Mr. Nesmith, a lost space monkey from Earth and a native Zeenuian Sheen takes a liking to, Aseefa.
The Emperor hires a tutor for Sheen to prepare him for a visit from Boh-Rok the Destroyer.
Sheen moves across the street from Dorkus.
When Aseefa's pet Chocktow goes missing, Sheen volunteers himself, Nesmith and Doppy to help her find him.
Princess Oom forces Sheen to face her ex-boyfriend in a battle for her affections, much to the reluctance of Sheen.
After Sheen entertains the Emperor with his amazing joint cracking ability, he convinces the Emperor to record his “amazing” achievements. In a fit of jealousy, Dorkus enlists the help of the Gronze brothers who accepts Sheen's challenge of being the best.
When Sheen grows tired of Zeenuian food, he searches out a lost crumb of tortilla from his spaceship. He plants it in the ground in hopes of growing some Earth food, but thanks to Dorkus, things go awry.
When Sheen experiences a Zeenu holiday, he regales the Zeenuians of tales of Earth holidays and convinces them to celebrate Thanksgetting which entails Sheen receiving gifts.
After Princess Oom is scared by Aseefa's warrior face, she convinces the Emperor to lock up all the citizens with “scary” faces, but Sheen must step in.
After the Emperor refuses to give out an acting award because Zeenuians acting is terrible, Sheen brags about how good of a tree actor he is. Dorkus overhears Sheen and creates a play where the final act will eliminate Sheen permanently.
After Sheen sees the Emperor's money suit, he decides he must make some cash to obtain his own but realizes it comes at a high cost.
Sheen realizes he no longer needs Ultra Lord.
After the Emperor's pet, Beebaw, goes missing and Nesmith is accused, Sheen convinces the Emperor to hold a trial.
Aseefa's pet gets captured by animal control while in Sheen's care.
Sheen tries to get Princess Oom to reconcile with her former boyfriend.
Sheen and his pals are ridiculed at a ball, where they expected to hear praise.
Sheen performs a magic act in which people really vanish.
Doppy's parents get help evicting their houseguest.
Sheen saves Nesmith from the clutches of a legendary beast.
Sheen launches a new art movement, and soon it monopolizes all of his time.
Sheen tries to hide something from Aseefa.
Sheen competes in a race involving flying-bug saucers.
Sheen pretends to be sick, and his fake illness becomes contagious.
Sheen decides to stop bathing, which makes him popular with a mob of dirt-loving creatures.
Sheen employs his wit to defeat a pompous, harmful plant.
Sheen searches for Mr. Nesmith's lost hat.
Sheen becomes attached to Princess Oom's tongue.
Sheen helps a guard prepare to battle an infamous beast.
Sheen and Dorkus wind up chained together underground.
Sheen explains baseball to the inhabitants of Zeenu.
Doppy and Sheen team up to battle monsters, prompting concern from Doppy's folks.
Sheen fills in for the Emperor and things fall into disarray.
Sheen practices medicine in a clinic.
Sheen damages a figurine collection and puts the blame on Doppy's pet.
Sheen opens an eatery featuring Earth food.
Aseefa transforms into a wild beast for one night, and Sheen helps her survive it.
Sheen tries to protect Zeenu from an outlaw with bad breath.
Sheen accidentally gives Princess Oom the most important part of his rocket ship and has to find a way to get it back.
Seeing an opportunity to destroy Sheen, Dorkus volunteers to train him for the "Manhood Trial by Fire."
Nesmith loses his voice, so Sheen comes to his rescue by using ventriloquism.
Aseefa needs to regain her Roove, so Sheen assists her.
In order to help Aseefa, Sheen purchases a black market mustache and must deal with the consequences when it gets out of control.
Sheen eats a berry that makes him huge and hazardous.
Sheen has to figure out a way to lead the Celebration of Legs Parade despite the fact that he's turning into an eel.
Sheen and Nesmith rescue Doppy from a group of gloop thieves, the Gashlubbs.
Sheen brings clown college to Zeenu.
Villains who give wedgies invade Zeenu.
Sheen mistakenly wakes up the Empress in the middle of her year-long slumber, so he must help her get back to sleep.
Sheen acquires a baby and gets parenting advice from Dorkus.
Sheen and his pals search for a banana, believing it will restore Mr. Nesmith to good health.