The BEST episodes of Underdog

Every episode of Underdog ever, ranked from best to worst by thousands of votes from fans of the show. The best episodes of Underdog!

There's no need to fear! Underdog is here! When criminals in this world appear And break the laws that they should fear And frighten all who see or hear The cry goes up both far and near For Underdog! Underdog! Underdog! Underdog! Speed of lightning, roar of thunder Fighting all who rob or plunder Underdog. Underdog! When in this world the headlines read Of those whose hearts are filled with greed Who rob and steal from those who need To right this wrong with blinding speed Goes Underdog! Underdog! Underdog! Underdog! Speed of lightning, roar of thunder Fighting all who rob or plunder Underdog. Underdog! ** The original airing order of the episodes is not available, but if you uncover it or have some info to add, please submit it. Thanks. **

Last Updated: 1/14/2026Network: NBCStatus: Ended
Saif Waif
star
9.08
50 votes

#1 - Saif Waif

Season 1 - Episode 1 - Aired 10/3/1964

Underdog breaks out of the phone booth, and hears the cries for help again. Underdog flies to the lady, who tells him that her little boy has been accidentally locked in a bank vault. With only this information, Underdog flies off toward the bank. He reaches a bank, crashes in, much to the shock of the occupants, and then proceeds to rip open the giant door to the vault. The bank president blows up at Underdog, saying that he's got the wrong bank! So, Underdog flies to the correct bank, and attempts to rescue the boy. But at first, nothing he tries works. He crashes through the vault door, only to crash through the whole building and the one next door as well. He tries using his X-ray vision to locate the boy, but instead, starts a fire! All the people in the bank are in a panic now! Underdog uses his atomic breath to blow out the fire, and in the process, blows virtually the whole building away! But at least the mother's little boy is found all safe and sound.

Watch Now:Amazon
The Great Gold Robbery (1)
star
8.50
4 votes

#2 - The Great Gold Robbery (1)

Season 1 - Episode 12 - Aired 11/7/1964

Riff-Raff is no longer Public Enemy No. 1, so he comes up with the ultimate plan: robbing a trainload of gold by distracting Underdog from his duties of protecting the gold on the train.

Watch Now:Amazon
The Bubbleheads (2)
star
8.50
2 votes

#3 - The Bubbleheads (2)

Season 1 - Episode 25 - Aired 12/26/1964

Watch Now:Amazon
The Marbleheads (4)
star
8.00
1 votes

#4 - The Marbleheads (4)

Season 3 - Episode 16 - Aired 10/1/1966

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. The next phase of their plan is to get the Granite Gun which is in the throne room of Captain Marblehead who is enjoying his meal. Polly attempts to clobber the Captain with a pipe, but it has no effect on his stone head. He then calls for the guards who round up the prisoners. In the confusion, the guards hurl a projectile at the prisoners who duck and allows it to break open a wall to reveal a phone booth. Shoeshine sees this opportunity and changes into Underdog. He races to free the prisoners only to face Captain Marblehead and the Granite Gun. Underdog gets temporarily made of stone but then breaks free. He then melts the Granite Gun with his x-ray vision. After defeating Captain Marblehead, he tells him to mine his own rocks in the quarry and then heads home and frees all those who were turned to stone.

The Tickle Feather Machine (2)
star
8.00
1 votes

#5 - The Tickle Feather Machine (2)

Season 2 - Episode 54 - Aired 1/1/1966

The Marbleheads (3)
star
8.00
1 votes

#6 - The Marbleheads (3)

Season 3 - Episode 15 - Aired 10/1/1966

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 defeat the army and head for Planet Granite. They then present the slaves to Captain Marblehead who orders them cracked open from their stone enclosures. He explains that they were brought to mine the rocks for the food for the Marbleheads and orders them sent to the mines. While working in the mine, Polly tries to call for Underdog, but with him disguised in his Shoeshine Boy persona, he has no place to change. He then suggests a revolt and the group makes a plan.

The Marbleheads (2)
star
8.00
1 votes

#7 - The Marbleheads (2)

Season 3 - Episode 14 - Aired 9/24/1966

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 their Granite Gun. Their mission is to collect 10 slaves to bring back to their planet to work in the rock mines. After reporting in to their fearless leader, Captain Marblehead, the two buffet on some of Earth's stones and marble. They then proceed with their mission and collect 10 slaves, which so happen, include Shoeshine Boy and Sweet Polly. Before they leave for home, they are observed and the army tries to stop them.

The Marbleheads (1)
star
8.00
1 votes

#8 - The Marbleheads (1)

Season 3 - Episode 13 - Aired 9/24/1966

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 of the fact that a secret door opens from the center of this strange thing and two evil looking space aliens emerge from this strange object.

The Just in Case (4)
star
8.00
1 votes

#9 - The Just in Case (4)

Season 3 - Episode 12 - Aired 9/17/1966

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 monkey takes the doll to the top of a volcano, preparing to throw the doll in. In the meantime, Riff Raff And his Ghost Ship Gang sneak aboard the Queen May and begin to loot the ship. Needing every ounce of his super strength to break the witch doctor's spell, Underdog takes one of his super energy pills. Free of the spell, Underdog flies to the Queen May with a paintbrush and a bucket of paint. Before long, the ghost ship is reveled by the superhero-cum-artist. Riff Raff and his Ghost Ship Gang are captured, and returned to prison.

The Just in Case (3)
star
8.00
1 votes

#10 - The Just in Case (3)

Season 3 - Episode 11 - Aired 9/17/1966

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 once she is on board the Ghost Ship. When the gang opens the contents of the merchant ship they just robbed, Polly emerges and runs calling for Underdog. They capture her but the gang is fearful that her cries will bring Underdog. At this point, Riff finally reveals what 'Just in Case' is,...Just in Case Underdog comes! The disguised fella is really a witch doctor who, along with a voodoo doll in the form of Underdog, is able to manipulate our hero and leave him helpless

The Just in Case (1)
star
8.00
1 votes

#11 - The Just in Case (1)

Season 3 - Episode 9 - Aired 9/10/1966

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 Polly to call for him. When Polly arrives, the chief officer explains what was overheard in the prison from some of the prisoners that Riff has obtained as part of his gang. Polly then calls for Underdog, who, disguised as shoeshine boy, is stalled waiting for a woman to exit the phone booth he needs to change in. Upon hearing that Underdog has been called, Riff makes the decision that his newly formed gang needs to leave immediately, taking with them a disguised little fella. When the gang asks why he needs to be taken along, Riff responds, 'Just in Case.'

The Big Dipper (4)
star
8.00
1 votes

#12 - The Big Dipper (4)

Season 3 - Episode 8 - Aired 2/5/1966

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 swallows a super energy pill from his ring and, regaining his super powers, he flies back to the city and tricks the two villains into giving him all of Simon's jars of water. In retaliation, Simon prepares to destroy the Big Dipper with his pistol. Our hero takes the gun away from Simon and knocks the two villains out. Underdog refills the world's entire waterway, saving the world once again.

The Big Dipper (2)
star
8.00
1 votes

#13 - The Big Dipper (2)

Season 3 - Episode 6 - Aired 1/29/1966

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 Ocean, he leaves Underdog stuck in the polluted mud of what was once the Atlantic Ocean.

Underdog Versus Overcat (4)
star
8.00
1 votes

#14 - Underdog Versus Overcat (4)

Season 3 - Episode 4 - Aired 1/22/1966

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 Felina, Underdog gives them coconut trees so they never run out of milk.

Underdog Versus Overcat (3)
star
8.00
1 votes

#15 - Underdog Versus Overcat (3)

Season 3 - Episode 3 - Aired 1/22/1966

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 Underdog refuses, Overcat will attack Earth.

Underdog Versus Overcat (2)
star
8.00
1 votes

#16 - Underdog Versus Overcat (2)

Season 3 - Episode 2 - Aired 1/15/1966

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 trap that drains his energy. He is taken to help Polly milk the cows.

Underdog Versus Overcat (1)
star
8.00
1 votes

#17 - Underdog Versus Overcat (1)

Season 3 - Episode 1 - Aired 1/15/1966

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 from them so they grab someone who does... Sweet Polly!

The Tickle Feather Machine (4)
star
8.00
1 votes

#18 - The Tickle Feather Machine (4)

Season 2 - Episode 56 - Aired 1/8/1966

The Tickle Feather Machine (3)
star
8.00
1 votes

#19 - The Tickle Feather Machine (3)

Season 2 - Episode 55 - Aired 1/8/1966

Batty Man (2)
star
8.00
1 votes

#20 - Batty Man (2)

Season 3 - Episode 30 - Aired 11/19/1966

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 country. Polly and Underdog investigate the mysterious goings on at Batty Man's castle. The pair are attacked by Batty Man. Underdog tries to fight off the evil villain's bat army, but the battle is too much for him and the duo are soon chained.

Simon Says Be My Valentine (2)
star
8.00
1 votes

#21 - Simon Says Be My Valentine (2)

Season 3 - Episode 18 - Aired 10/8/1966

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 machine, handcuffed to a pole and gagged.

Simon Says Be My Valentine (3)
star
8.00
1 votes

#22 - Simon Says Be My Valentine (3)

Season 3 - Episode 19 - Aired 10/15/1966

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 into to a paper valentine. Then Simon tells Cad and the henchmen to load the machine in to a truck to take it to City Hall to turn the Mayor into a paper valentine. Before they go, they re-handcuff Polly to the pole so when she comes to she can look at her beloved hero

Simon Says Be My Valentine (4)
star
8.00
1 votes

#23 - Simon Says Be My Valentine (4)

Season 3 - Episode 20 - Aired 10/15/1966

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 vitamin pill." She sees Underdog is flat but all right. She finds a flat energy pill in the ring and when she give it to him he breaks out of the Valentine, takes the handcuffs off her hand and they fly to City Hall. There, Underdog saves the mayor and stuffs Simon, Cad and the two henchmen in the machine. Polly turns them into Valentines.

Round and Round (1)
star
8.00
1 votes

#24 - Round and Round (1)

Season 3 - Episode 21 - Aired 10/22/1966

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 planet. Zorb explains to his henchman, Cron, his plan to use the capsule as a decoy to lure Underdog. The capsule lands on the planet and gets stuck in the mud. A call is made to Underdog to rescue the planet. After freeing the ship, Cron approaches with a charm and puts it around Underdog as a gift. Underdog, thinking he is a friend suggests to bring Cron back to Earth.

Round and Round (2)
star
8.00
1 votes

#25 - Round and Round (2)

Season 3 - Episode 22 - Aired 10/22/1966

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 and retrieval of the alien. However, once he stands up, he becomes dizzy as things begin to spin around. Back on the strange planet, Zorb explains that as long as Underdog wears the charm around his neck, he will become dizzy. He then checks on Cron, who is being examined by scientists. Cron is caged when he becomes agitated. He then takes a pill Zorb gave him which causes him to grow and break free.