Summary: Peter and So-So try to warn a disbelieving Jack and the Beanstalk about the giant who wants to get him. They knock out the giant but when they realize that Jack is trying to steal the goose that lays golden eggs, they switch sides and revive the giant. The grateful giant informs Peter that Jack stole the wrong goose.

Summary: Peter and So-So encounter a cowardly lion. They are captured by Romans and sent to the coliseum for a fight. Peter and the cowardly lion agree to rig the fight. Peter doesn't realize right away that a brave lion replaced the cowardly lion. He holds off the brave lion with his hippo hurricane holler and escapes to his balloon. Once airborne, he finds the cowardly lion hiding in the balloon and afraid of heights.

Summary: Peter and So-So land in Egypt and meet Julius Caesar, who is despondent about losing the favor of Cleopatra. They go to Cleopatra's barge to speak for Caesar. Cleopatra forgives Caesar without Peter's knowledge. Peter tries to use reverse psychology with Cleopatra and speaks insultingly about Caesar. Caesar overhears the insults and attacks Peter. Peter uses his hippo hurricane holler to escape back to his balloon.

Summary: Peter and So-So land in a medieval-age town to get food. They can't get food without money so they get a job removing a pest for the king. The pest is a very difficult to eradicate dragon. They disguise themselves as a lady dragon to lure out the dragon. That strategy works too well and they run back to their balloon and take off. They are chased by the dragon in mid-air because it still sees the lady dragon costume.

Summary: Peter and So-So land in the middle of an old Western wagon train that is being attacked by Indians. The cowboys force Peter to fight the Indian chief's son in a winner-take-all battle. Peter wins using his hippo hurricane holler. When the Indian chief finds out the cowboys are going to Hollywood, he joins up with them.

Summary: When Peter falls out of the time-traveling balloon, he flops onto Captain Bligh's pirate ship--who looks like Charles Laughton. Timing is everything. The crew has just jumped ship--and now Peter's at the beck and call of the bad captain, who has recruited him as his new crew against Peter's wishes. This time, Captain Bligh gets more than he bargained for.

Summary: Peter and So-So want to join Robin Hood and his merry men but fail the series of tests. Their last chance is to rescue Lady Marion from the sheriff. They bring the sheriff, disguised as Lady Marion, back to Robin. The sheriff announces he wants to join Robin's troupe too.

Summary: Peter and So-So's balloon goes too high, gets hit by an asteroid, and lands on a strange planet. Peter gets enlisted to play the beast in a movie being made there, "The Beast from Planet Earth," but things rapidly get out of hand. The part proves too painful for Peter to bear.

Summary: Peter and So-So can break a spell on a haunted castle if they stay there overnight. Using various tricks, the resident ghost unsuccessfully tries to scare them away. With the spell broken, the ghost leaves the castle and takes residence in Peter's balloon.

Summary: Peter looks just like Omega, the legendary leader of a group of island natives. The chief makes Peter take a series of tests to prove he's Omega. It looks like he failed but the chief says he passed and offers to make Peter the new leader. Peter declines and runs back to the balloon.

Summary: Peter lands in the midst of two feuding hillbilly families – Quagmires and Scrags. Peter unsuccessfully tries to reason separately with two of the combatants. The feud ends when Peter, dressed as Cupid, make the two fall in love and get married.

Summary: Peter helps Little Red Riding Hood by donning her red cape and delivering the goodies to Grandma's house. The wolf unsuccessfully tries various tactics to stop him. The wolf is sent off into the distance with Peter's hippo hurricane holler, which Red learns too.

Summary: Peter and So-So land on an island and find a pirate's treasure. The pirate chases Peter and he retreats back to his balloon. Peter's hippo hurricane holler lands the pirate and his ship into a prison.

Summary: Peter and So-So land in an old English town. Peter pulls a sword from a stone and the king proclaims him the defender of the people. When Peter is tasked with battling an ogre he tries to slink back to his balloon instead but the balloon is already airborne. So-So knocks out the ogre from the balloon but Peter gets the credit. Peter then must fight a fierce black knight, who Peter, using his hippo hurricane holler, discovers is just a shrimp on stilts.

Summary: Peter tries out a new time-space machine and ends up in old west Arizona. Peter jumps out of the balloon and lands on and disables the village's avenger, Senor El Zingo. Peter takes the place of the avenger to face the villain Don Jose el Tic-tac-taco. The villain is done in by Peter's hippo hurricane holler. Peter sends El Zingo, with nothing to do now, to Don Jose as well.

Summary: So-So spins the time-space machine and sends the balloon to prehistoric times. Peter removes a thorn from a dinosaur's foot. Now they can't rid themselves of the grateful dinosaur but are elated when the dinosaur saves Peter from an attacking caveman. The dinosaur, imitating Peter's hippo hurricane holler, accidentally sucks the balloon inside his belly. Peter and So-So, on the balloon still inside the dinosaur, float off.

Summary: Peter and So-So escape an attacking fish using the time-space machine. They end up under fire by World War I ace, Baron von Rip-em-up. The troops on the ground think Peter was sent by headquarters to fight the Baron. The two dogfight in biplanes. The Baron's apparent advantage in the battle is lost when Peter uses his hippo hurricane holler.

Summary: Peter gets out of a bad storm using the time-space machine and ends up in Verona, Italy. He falls out of the balloon and disables Romeo. Romeo enlists Peter's help to go get Juliet but Juliet's father is trying to prevent it. Juliet's father is sent away with Peter's hippo hurricane holler. Romeo and Juliet are married and go off on their honeymoon together using Peter's balloon.

Summary: The time-space machine takes Peter and So-So to the old West. Peter lands in a train and is sworn in as a marshal before the real marshal jumps off the train. Peter battles Jessie Jimmy, who is trying to rob the train. Jessie is finally defeated with Peter's hippo hurricane holler, which blows Jessie right to the State Prison.

Summary: Merlin, the magician, is enlisted by King Arthur to find someone to battle an ogre. The time-space machine takes Peter and So-So to Merlin at that time. Peter reluctantly fights the fire-breathing ogre and defeats him using his hippo hurricane holler.

Summary: Caught in the middle of a hillbilly feud, Peter and So-So escape using the time-space machine. It takes them to a village being attacked by a monster made by mad scientist Plankenstein. Peter defeats the monster with his hippo hurricane holler. Plankenstein uses the monster parts to build a merry-go-round for the villagers.

Summary: Peter is forced by villagers to get their tax money back from a tyrant. It looks like he will fail until he resorts to using his hippo hurricane holler, which blows the money back to the villagers. The tyrant then announces higher taxes because of the depletion of his treasury and now the villagers are mad at Peter, who escapes in the balloon.

Summary: Using the time-space machine, Peter and So-So escape from attacking island natives, a caveman, a WWI flying ace, and a British man-of-war ship before finally landing in the old West. Peter looks just like a bandit on a wanted poster. He's arrested by the sheriff but escapes using his hippo hurricane holler.

Summary: Peter and So-So meet Christopher Columbus, who appoints Peter as his emissary to some hostile Indians. Peter fails with negotiations until he resorts to his hippo hurricane holler. The Indian chief capitulates and signs the peace treaty. Columbus gives Peter the title Don Peter Potamus.

Summary: Peter and So-So land in America during the time of the Revolution. Peter and So-So spread the word that the redcoats are coming from their balloon. They are shot down by British soldiers. They escape pursuit donning British uniforms but then are chased back to their balloon by American troops.

Summary: Peter and So-So end up in Colonial America, where they meet Miles Standoffish. He wants to marry Priscilla, but she refuses to become his wife unless he can prove he's a good provider. Peter helps him by using the Hippo Hurricane Holler to round up wild game. Priscilla agrees to marry Miles, but in the end, it turns out all she wanted was for him to do all the housework while she nagged him to death.

Summary: Peter and So-So evade a missile using the time-space machine and end up meeting William Tell. Because William fails to remove his hat in front of the king, he is given the punishment to shoot an apple off his son's head. Since it was Peter's fault, William makes Peter take his place and shoot an apple off So-So's head. Peter misses and is pursued by both the king and William. His hippo hurricane holler causes an avalanche, which enables them to escape