Premiering on September 10, 1966 the cartoon was part of the then current Hanna-Barbera formula of pairing two cartoons together on a single show and in this case the other cartoon was a humorous superhero show called the Impossibles. Frankenstein Jr told the story of boy genius Buzz Conroy and his super robot creation Frankenstein Jr as they protected Civic city from all manner of villainous plots.
Critics have compared the cartoon the Japanese cartoon Gigantor, also about a boy and his giant robot and there are many similarities however Gigantor doesn't speak with the fantastic voice of TV's Lurch Ted Cassidy or wear a stylish mask so take that Testujin 28.
1 The Shocking Electrical Monster Dr. Shock uses his Master Mix Monster Machine to turn his assistant Igor into an electricity-absorbing monster.
2 The Spyder Man 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 Spyder Man.
3 Menace from the Wax Museum Upon an encounter with Buzz at the wax museum, Mr. Menace uses his monsters Gadzonka, Gorillis, and Cyclaws in an attack upon San Francisco.
4 Alien Brain from Outer Space Part 1 A giant alien brain arrives on Earth and captures Buzz and Professor Conroy.
5 Alien Brain from Outer Space Part 2 A giant alien brain arrives on Earth and captures Buzz and Professor Conroy
6 UFO: Unidentified Fiendish Object The alien Zargon unleashes his warrior Destructo in his plans to conquer Earth.
7 Unearthly Plant Creatures Plant Man thaws the last three prehistoric plant creatures (consisting of Carnivorous Chewer, Creeping Crusher, and Fire-Breathing Snapdragon) from a glacier and then sprays them with his Obedience Ray in a plot to eliminate Buzz and Frankenstein Jr.
8 Deadly Living Images The Mad Inventor has invented the Double Identity Duplicator Projector to make copies of whatever pictures he inserts in it.
9 Colossal Junk Monster Junk Man creates the Colossal Junk Monster in a plot to eliminate Frankenstein Jr.
10 The Incredible Aqua-Monsters Buzz and Frankenstein Jr. guard the Navy's new Hydrotomic Submarine to prevent Dr. Hook and his aquatic monsters from stealing it.
12 The Birdman Birdman and his robotic birds Vulturo, Rodantus, and King Condor abduct two astronauts and holds them for a ransom of $1,000,000.
13 Invasion of the Robot Creatures 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.
14 The Manchurian Menace Manchurian Menace steals a Space Camera Capsule that has just returned with photos from Mars.
15 The Mad Monster Maker To perform a crimewave in London, Baron Von Ghoul creates robotic versions of horror movie monsters Electroflying Firefly, Menacing Mummy, and the Wicked Werewolf.
16 The Monstermobile The Mad Inventor has invented the Monstermobile and uses its many gadgets to commit crimes.
17 Pilfering Putty Monster 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.
18 The Spooktaculars Dr. Spectro creates three giant ghoulish ghosts in order to take over Penciltrainia.