Underdog: Season 3
Season 3 Lore Primer
Key plot threads, lore context, and character stakes you need to remember before diving into this season.
- Directly follows the overarching narrative developments of Underdog Season 2.
- Faction dynamics and core character alliances shift under escalating external stakes.
- Crucial mysteries introduced previously reach key turning points and narrative reckonings.
- Sets up serialized story arcs that build directly toward the climactic season finale.
Episode Guide
Season 3 Progress Shield
Underdog vs. Overcat, Part 1
Jan 15, 1966
The planet Felina's milk wells have run dry which makes the evil ruler Overcat mad. He and his men go to Earth and steal all the cows. However, they don't know how to get the milk
Underdog vs. Overcat, Part 2
Jan 15, 1966
Polly tells Overcat about Underdog but he is not worried; he kidnaps her to milk the cows. Polly calls for Underdog. When he gets to Overcat's planet, he is placed in a rubber ball
Underdog vs. Overcat, Part 3
Jan 22, 1966
Polly gives Underdog his energy pill and he beats Overcat's men. Next, Underdog takes Polly and the cows back to earth. Overcat challenges Underdog to a fight for the cows. If Unde
Underdog vs. Overcat, Part 4
Jan 22, 1966
At first it look like Overcat is going to win. But even though he's as strong as Underdog, he's not fast. Underdog uses his speed to beat Overcat. When the cats kick Overcat out of
The Big Dipper, Part 1
Jan 29, 1966
Sinister and Cad invent another evil device they call the Big Dipper, a machine that can dry up all of the world's water supplies. On its first trials, the Big Dipper does little m
The Big Dipper, Part 2
Jan 29, 1966
Simon and Cad have invented a device to drain off the world's water supply. The pair travels around the world and steal all of the world's water. When Simon steals the Atlantic Oce
The Big Dipper, Part 3
Feb 5, 1966
Simon and Cad have drained the Atlantic Ocean and they've defeated Underdog. They return to the USA where the people are demanding their water back. But Simon says, "Unless You do
The Big Dipper, Part 4
Feb 5, 1966
Simon has finally forced the people of the city and the world to give him ultimate power. Underdog is still stuck in the polluted mud of what was once the Atlantic Ocean. He swallo
Just in Case, Part 1
Sep 10, 1966
The prison warden's chief officer informs him that Riff Raff is assembling a gang and is planning on escaping. They feel that they need to tell Underdog, so they send for Sweet Pol
Just In Case, Part 2
Sep 10, 1966
As Riff Raff and his newly acquired gang is being pursued by the prison guards, Shoeshine Boy is finally able to change into Underdog and fly to the prison. At the shore of the riv
Just In Case, Part 3
Sep 17, 1966
Riff and his gang decide to rob one more vessel before they go for their biggest catch, The Queen May. But, Polly has hidden herself as a decoy so that she can call for Underdog on
Just In Case, Part 4
Sep 17, 1966
Polly watches helplessly as Underdog fall victim to the witch doctor's voodoo spell. Luckily, a passing sea gull grabs the Underdog doll and takes it to a remote island. There, a m
The Marbleheads, Part 1
Sep 24, 1966
A strange object crash-lands on earth. A group of scientists check out the mysterious object, determining that it's a harmless, dead comet. The scientists leave the scene unaware o
The Marbleheads, Part 2
Sep 24, 1966
After all the reporters and news crew leave the site of the strange object, two stonehead creatures from the planet Granite, named Gravel and Crusher, emerge from the craft with th
The Marbleheads, Part 3
Oct 1, 1966
Just before they are ready to head home with their slaves they captured with the Granite Gun, Crusher and Gravel are confronted by the army. Using the Granite Gun, the stoneheads d
The Marbleheads, Part 4
Oct 1, 1966
In this final episode, Shoeshine asks for a drink of water after being placed in his cell. When he gets it from the guard he tosses it into the guards eyes. While the guard tries t
Simon Says, Be my Valentine, Part 1
Oct 8, 1966
Simon invents the Valentine Vault which turns people into paper valentines. He orders Cad and his two henchmen to kidnap Sweet Polly... to set a trap to catch Underdog in the machi
Simon Says 'Be My Valentine', Part 2
Oct 8, 1966
Shoeshine Boy sees Cad and his henchmen kidnap Polly. He must let them beat him up to protect his secret identity. He waits in line for the phone booth while Polly is told of the m
Simon Says 'Be My Valentine', Part 3
Oct 15, 1966
Shoeshine Boy finally transforms into Underdog. He frees Polly, but she faints before warning him about the Valentine machine. Underdog charges in but is crushed flat and turned in
Simon Says 'Be My Valentine', Part 4
Oct 15, 1966
Polly pulls the handcuffs off of the pole and cries over her now-paper hero. Then she hears the familiar saying, "The secret compartment of my ring I fill with an Underdog energy v
Round and Round, Pt 1
Oct 22, 1966
Sweet Polly is reporting a launch in space but the capsule is pulled off course to an uncharted planet. On this planet, the evil Zorb used a magnet to pull the capsule to his plane
Round and Round, Pt 2
Oct 22, 1966
After returning from a strange planet and wearing a charm that the alien from the planet he brought back to Earth with him, Underdog is interviewed by Sweet Polly about the rescue
Round and Round, Pt 3
Oct 29, 1966
When Underdog gets dizzy during an interview after returning from a strange planet, he is rushed to the hospital where the doctors try to find the cause. Meanwhile, the alien grows
Round and Round, Pt 4
Oct 29, 1966
In the final episode, the giant finishes toying with Underdog and bats him back to the hospital. With Underdog out of the picture, the Army, Navy and Air Force is called into actio
A New Villain, Part 1
Nov 5, 1966
After a violent thunderstorm ravages the city, the community gathers in front of one of the steel buildings to see a message revealed inscribed on its side: 'To Underdog, A Rhyme i
A New Villain, Part 2
Nov 5, 1966
Flim and Polly agree that humble, loveable Shoeshine boy would be able to make sense of the riddle 'A Rhyme in Time Saves Nine'. Shoeshine deduces that 'rhyme' refers to Underdog,
A New Villain, Part 3
Nov 12, 1966
The Electric Eel traps Underdog in his electric cage. As the cage closes in around him, the cage fills Underdog's body with thousands of volts. Before he dies, Underdog asks the vi
A New Villain, Part 4
Nov 12, 1966
The Electric Eel and his gang head for Washington, D.C. to take over the country. But Underdog is on the mend; the waters of the lake sap the electric charges from the Eel's trap.
Batty Man, Part 1
Nov 19, 1966
A series of crimes are being perpetrated all over the country. Underdog tries to solve them, but finds no clues as to who is behind the crime wave. Who is the new super villain beh
Batty Man, Part 2
Nov 19, 1966
Batty Man, a take-off of Bela Lugosi's Count Dracula is an evil vampire. He, with his hench-bat Georgie and his army of giant vampire bats are committing the crimes all over the co
Batty Man, Part 3
Nov 26, 1966
Batty Man has captured Polly and Underdog. The villains raid Fort Knox, returning to Batty Man's castle with the plundered gold. The villains press the gold into a bowling balls. B
Batty Man, Part 4
Nov 26, 1966
Polly and our hero have been placed onto the conveyor belt of Batty Man's bowling ball presser. The steam from the machine loosens Polly's chains, enabling her to give Underdog his
The Vacuum Gun, Part 1
Dec 3, 1966
Simon Bar Sinister makes a vacuum gun which he uses to catch Riff Raff, Electric Eel, Batty man and all of their men for his army while Underdog is saving a sinking ship.
The Vacuum Gun, Part 2
Dec 3, 1966
Sweet Polly is captured by Simon and calls for Underdog. Unfortunately, his energy was drained from saving the ship so he and Polly were sucked in the vacuum gun and Simon starts t
The Vacuum Gun, Part 3
Dec 10, 1966
Underdog's ring has fallen off his finger; Polly dives underwater to find it. Meanwhile, Simon and his army are using their vacuum guns to steal all the money in the US.
The Vacuum Gun, Part 4
Dec 10, 1966
Polly finds Underdog's ring. He takes his energy pill then defeats Electric Eel, Riff Raff and Batty Man. Simon uses his vacuum gun but since Underdog has his powerful strength bac
Phoney Booths, Part 1
Sep 4, 1965
Cad, Simon Bar Sinister's henchman, replaces real phone booths with Phoney Booths. When he returns to the lab to tell his boss all the booths have been replaced, he asks what they
Phoney Booths, Part 2
Sep 4, 1965
More unsuspecting people fall prey to Simon's Phoney Booths. A banker steps into a booth and is ordered to bring all the money from the bank. An engineer steps into a booth and is
Phoney Booths, Part 3
Sep 11, 1965
Simon toys with Underdog who is now in his power after stepping into one of Simon's Phoney Booths. He makes him dance, bring the 1st National bank to him, and then has him retrieve
Phoney Booths, Part 4
Sep 11, 1965
Simon instructs an entranced Underdog to destroy Polly. As he approaches the trapped reporter, his brain fights the mind control Simon has and finally shatters the bulb above his h