Episode 1
The Bubbler kidnaps the Shah of Shish-Ka-Bob and it's up to the Impossibles to rescue him.
Episode 2
Dr. Shock uses his Master Mix Monster Machine to turn his assistant Igor into an electricity-absorbing monster.
Episode 3
The Spinner steals a $1,000,000 tiara.
Episode 4
The Paper Doll Man steals a top secret plan and is out to steal the second part.
Episode 5
Professor Conroy and Buzz unveil the blueprints for the Spy Detector XK-00-7 at a Maximum Security Building. Unfortunately, the blueprints are targeted by the Spyder Man.
Episode 6
Beamatron steals a priceless painting from a ship.
Episode 7
The Burrower uses his burrowing machine to steal half a million dollars from the bank and dig ten miles down to his lair.
Episode 8
Upon an encounter with Buzz at the wax museum, Mr. Menace uses his monsters Godzonka, Gorillis and Cyclaws in an attack upon San Francisco.
Episode 9
Timeatron uses his time cabinet to bring villains from the past to pillage for him.
Episode 10
Smogula freezes the Impossibles and seals them within a cave, so they will not interfere with his plans to conquer Empire City.
Episode 11
A giant alien brain arrives on Earth and captures Buzz and Frankenstein Jr.
Episode 12
The Speck uses a formula to shrink himself in order to photograph top secret plans.
Episode 13
To get the Impossibles out of the way, Fero uses his fiddle to transport them to different planets.
Episode 14
Episode 15
Mother Gruesome invents a machine that brings villainous storybook characters out of their stories to help her with her crimes.
Episode 16
Televisatron transports the Impossibles to different television shows.
Episode 17
The alien Zargon unleashes his warrior Destructo to conquer Earth.
Episode 18
The Dauber uses a special brush where anything he paints becomes real.
Episode 19
Aquator has stolen a secret formula from a scientist who is friends with Big D and shrinks himself to microscopic size in order to get all the microscopic creatures to become large.
Episode 20
Plant Man thaws the last three prehistoric plants (the Carnivorous Chewer, the Creeping Crusher and the Fire-Breathing Snapdragon) from a glacier and then sprays them with his Obedience Ray in a plot to eliminate Buzz and Frankenstein Jr.
Episode 21
Professor Stretch causes havoc with his elastic abilities.
Episode 22
The Dragster has stolen a valuable item.
Episode 23
The Mad Inventor has invented the Double Identity Duplicator Projector to create living images he can control.
Episode 24
The Spinner returns and steals a priceless pooch.
Episode 25
The Surfer takes pictures of a top secret submarine.
Episode 26
The Junk Man creates the Colossal Junk Monster in a plot to eliminate Frankenstein Jr.
Episode 27
Episode 28
Spraysol steals top secret documents.
Episode 29
Buzz and Frankenstein Jr. guard the Navy's new Hydrotomic Submarine to prevent Dr. Hook and his aquatic monsters from stealing it.
Episode 30
The Sculptor turns people into statues.
Episode 31
The Archer steals a priceless violin and a million dollars.
Episode 32
Zorbo the Great creates a genie and plans to use its three wishes in order to defeat Frankenstein Jr. and conquer the world.
Episode 33
The Inflator creates giant balloon monsters to help him commit crimes.
Episode 34
The Diamond Dazzler steals a precious diamond in order to awaken the genie within.
Episode 35
Birdman and his robotic birds Vulturo, Rodantus, and King Condor abduct two astronauts and hold them for a ransom of $1,000,000.
Episode 36
The Paper Doll Man returns and causes trouble.
Episode 37
A witch named Cronella Critch robs a charity for orphans party.
Episode 38
Sertano the Satellite King, an alien from Galaxy X, uses a gravity ray in order to get Earth to surrender. Buzz and Frankenstein Jr. must defeat Sertano's robots in order to defeat him.
Episode 39
The Twister is stealing precious jewels.
Episode 40
Professor Stretch returns and creates a rubber monster to help him.
Episode 41
Episode 42
The Tapper transmits himself over phone lines.
Episode 43
The Angler steals secret space research.
Episode 44
To perform a crime wave in London, Baron Von Ghoul creates robotic versions of the horror movie monsters the Electroflying Firefly, the Menacing Mummy, and the Wicked Werewolf.
Episode 45
The Ringmaster puts on a circus and robs from those who attend.
Episode 46
Billy the Kidder is a cowboy who rides a robotic horse and plans to rob the U.S. Mint.
Episode 47
The Mad Inventor has invented the Monstermobile and uses its many gadgets to commit crimes.
Episode 48
Dr. Futuro comes from the 40th century to the twentieth century to steal a million dollar gold brick.
Episode 49
The Clutcher uses an invention that brings his gloves to life.
Episode 50
Mr. Menace uses his putty monster to steal a $1,000,000 coin collection and even kidnaps Buzz. It is up to Frankenstein Jr. to rescue Buzz and defeat Mr. Menace.
Episode 51
Mr. Instant uses his insta-gun that can make anything in an instant.
Episode 52
The Batter kidnaps a baseball star and holds him for ransom.
Episode 53
Dr. Spectro creates three giant ghoulish ghosts in order to take over Penciltrainia.
Episode 54
Mr. Ice and his henchman Freezer Freezer freeze the city in order to take it over.
