The series starred Milton the Monster, a Frankenstein-looking monster with a flat-topped, seemingly hollow head which emitted various quantities of white steam or smoke based on his mood or situation. In the show also appear Fearless Fly, Flukey Luke, Stuffy Durma the Millionaire Hobo, Muggy-Doo Boy Fox and Penny Penguin. There were 26 episodes with three cartoon shorts each.
Episode 1
Goo Fee hopes to trap Fearless Fly in a super-adhesive flypaper.
Episode 2
Flukey Luke attempts to stop Spider Webb from stealing the Hopeless Diamond.
Episode 3
Milton, Heebie and Jeebie court Zelda the Zombie.
Episode 4
Goo Fee engages Fearless Fly in a deadly game of horseshoes.
Episode 5
Muggy-Do, Boy Fox, steals an organ grinder's monkey to create modern art.
Episode 6
Professor Weirdo tries to marry Milton off to a wealthy spinster.
Episode 7
Fearless Fly battles the flyweight judo champion, Fatty Karate.
Episode 8
Muggy-Do is a publicity agent who gets a job at Paranoid Pictures.
Episode 9
Professor Weirdo hires out his monsters in order to pay his rent.
Episode 10
Fearless Fly battles Captain Fligh.
Episode 11
Muggy-Do is a vacuum cleaner salesman who ends up as a counter-espionage agent.
Episode 12
Professor Fruitcake makes a voodoo doll of Professor Weirdo.
Episode 13
Gung Ho captures Horsey, mistaking him for Fearless Fly.
Episode 14
Muggy-Do, working as a bellboy, makes a dishonest buck off a movie-star guest.
Episode 15
Professor Weirdo tries to prevent his Aunt Hagatha from seeing Milton.
Episode 16
Goo Fee forces Gung Ho to try and blow up himself and Fearless Fly.
Episode 17
Stuffy Durma, the Millionaire Hobo, gets a visit from an old friend.
Episode 18
Professor Weirdo conducts a séance.
Episode 19
Goo Fee tries to bribe Hiram into betraying Fearless Fly.
Episode 20
Flukey Luke chases down the masterpiece-stealing Spider Webb.
Episode 21
Count Kook leads a revolt against Professor Weirdo.
Episode 22
Goo Fee pretends to be dying in order to lure Fearless Fly into his trap.
Episode 23
Penny Penguin causes trouble between her father and a mechanic.
Episode 24
Aunt Hagatha visits to teach the monsters some manners.
Episode 25
Goo Fee steals Fearless Fly's matchbox, falsely believing the super-insect to be inside.
Episode 26
Spider Webb hires a Mexican bandit to stop Flukey Luke.
Episode 27
Prof. Weirdo sells Milton to a gangster running a protection racket.
Episode 28
Goo Fee hires a ruthless Mexican hombre to destroy Fearless Fly.
Episode 29
Flukey Luke thwarts a plot to steal money from a royal prince.
Episode 30
Two monster clubs fight over the Marlon Brando-like Fangenstein.
Episode 31
Goo Fee promises his servant the throne if he captures Fearless Fly.
Episode 32
A Chinese astrologer honors Muggy-Do.
Episode 33
Milton, Heebie and Jeebie are inducted into the army.
Episode 34
Doctor Goo Fee sprays his servant with an invisibility formula and sends him to steal works of art.
Episode 35
Stuffy Durma joins a boys' baseball game.
Episode 36
The family's shrunken head wants revenge on Prof. Weirdo.
Episode 37
Fearless Fly must stop Prof. Weirdo from turning small animals into monsters
Episode 38
Stuffy Durma tries to sneak Ash Can Annie into the mansion.
Episode 39
Prof. Weirdo and Prof. Fruitcake engage in a deadly game of tit-for-tat.
Episode 40
Goo Fee tricks Fearless Fly into building a sphinx in the evil wizard's honor.
Episode 41
Penny Penguin squalls for a bigger allowance.
Episode 42
Prof. Weirdo tries to sell Heebie and Jeebie to Prof. Fruitcake.
Episode 43
Fearless Fly battles Professor Weirdo's giant spider.
Episode 44
Penny Penguin ruins her parents' second honeymoon.
Episode 45
Prof. Weirdo sells Milton to Professor Fruitcake.
Episode 46
Prof. Weirdo's new monster, George, proves too nice to battle Fearless Fly.
Episode 47
Muggy-Do harasses Osh at his new bakery.
Episode 48
Prof. Weirdo sets a trap for a vampire.
Episode 49
Two mobsters kidnap Milton.
Episode 50
Fearless Fly battles the Martians.
Episode 51
Witches holding their annual convention catch Heebie and Jeebie spying on them.
Episode 52
Prof. Weirdo sends his monsters to a day camp.
Episode 53
Fearless Fly battles an out-of-control computer system at an automobile plant.
Episode 54
Prof. Weirdo accuses Milton of stealing his hearse.
Episode 55
Heebie and Jeebie pretend to be the ghosts of their ancestors.
Episode 56
Fearless Fly battles Barry Cuda and his giant clams.
Episode 57
Prof. Weirdo takes in an underprivileged child.
Episode 58
Prof. Weirdo has Milton bury him alive in order to subvert a curse.
Episode 59
A seductress learns the secret of Fearless Fly's power.
Episode 60
Moon-men arrive and eat Prof. Weirdo's furniture.
Episode 61
Mike, the mechanical man, monster-sits Milton.
Episode 62
Goo Fee and Gung Ho get marooned on a tropical island.
Episode 63
Milton attempts to use his retro-rocket head to propel himself to the moon.
Episode 64
Fangenstein kidnaps the shrunken head, who knows the location of buried treasure.
Episode 65
Goo Fee employs a private detective with a secret-revealing computer.
Episode 66
Two spies brainwash Milton.
Episode 67
A lightning bolt brings Prof. Weirdo's mummy to life.
Episode 68
Goo Fee produces and directs a movie with Fearless Fly.
Episode 69
Fangenstein and Abercrombie the zombie build a mummy corral.
Episode 70
Goo Fee invites Fearless Fly on an African safari.
Episode 71
Stuffy Durma meets Grubstake Greeley, the gold prospector.
Episode 72
Professor Fruitcake kidnaps Blackie the Bat.
Episode 73
Milton's pet crocodile finds sunken treasure.
Episode 74
Fearless Fly battles the wrestling Sultan of Fly-geria, Ferocious Fly.
Episode 75
Prof. Weirdo's evil spirit solution turns Milton into a rampaging beast.
Episode 76
Goo Fee instigates war between Fearless Fly and a French general.
Episode 77
Flukey Luke guards a Stradivarius.
Episode 78
Milton finds the Mummy's Thumb, which turns anything it touches to gold.