Watch Underdog: The Ultimate Coll... Season 1
Episode 18
18. Round and Round, Parts 3 & 4
aired: Tue, Nov 1, 1966
With no dizzy cure in sight, will Underdog be able to save the world from Cron, the rampaging giant?
Episode 17
17. Round and Round, Parts 1 & 2
aired: Tue, Nov 1, 1966
Underdog is under the dizzying spell of Zoom, the evil ruler of a far away planet.
Episode 16
16. Riffraffville, Parts 3 & 4
aired: Sat, Jan 1, 1966
A prisoner in Riffraffville, Sweet Polly Purebred is in need of saving, but without his "Super Energy Pill," will Underdog be up for the job?
Episode 15
15. Riffraffville, Parts 1 & 2
aired: Sat, Jan 1, 1966
After suffering a slew of foiled robberies, Riff Raff takes his crime gang out West.
Episode 14
14. Weathering the Storm, Parts 3 & 4
aired: Wed, Sep 1, 1965
When Simon threatens to press all the keys on his "Weather Machine," will Underdog be able to stop tornados, earthquakes, floods and hurricanes at the same time?
Episode 13
13. Weathering the Storm, Parts 1 & 2
aired: Wed, Sep 1, 1965
Simon Barsinister hijacks a spaceship, and shoots off to the moon to test his latest invention, the "Weather Machine."
Episode 12
12. The Marbleheads, Parts 3 & 4
aired: Sat, Oct 1, 1966
Will Underdog be able to stop the Marbleheads and their "Granite Gun" without becoming one of their slaves?
Episode 11
11. The Marbleheads, Parts 1 & 2
aired: Sat, Oct 1, 1966
Rock-eating Marbleheads from the Planet Granite have invaded Earth.
Episode 10
10. The Big Shrink, Parts 3 & 4
aired: Tue, Dec 1, 1964
How will Underdog defeat the mad scientist once and for all, when he has been shrunken down so small?
Episode 9
9. The Big Shrink, Parts 1 & 2
aired: Tue, Dec 1, 1964
In an attempt to become the biggest man in the world, Simon Barsinister invents "shrinking water" and shrinks everyone...even Underdog!
Episode 8
8. The Great Gold Robbery, Parts 3 & 4
aired: Sun, Nov 1, 1964
While Underdog is busy saving Sweet Polly Purebred, a massive train crash is in Riff Raff's golden plan.
Episode 7
7. The Great Gold Robbery, Parts 1 & 2
aired: Sun, Nov 1, 1964
Riff Raff and his gang devise a diabolical plan to rob a freight train of its gold.
Episode 6
6. Fearo the Ferocious, Parts 3 & 4
aired: Tue, Dec 1, 1964
When Fearo escapes, will Underdog be able to save Polly from the giant ape's ferocious clutches?
Episode 5
5. Fearo the Ferocious, Parts 1 & 2
aired: Tue, Dec 1, 1964
Sweet Polly Purebred is sent to a mysterious island to report on the world's mightiest monster, Fearo the Ferocious!
Episode 4
4. The Gold Bricks, Parts 3 & 4
aired: Fri, Oct 1, 1965
In an attempt to clear Underdog's name, Polly Purebred gets herself into a situation that even Underdog might not be able to solve!
Episode 3
3. The Gold Bricks, Parts 1 & 2
aired: Fri, Oct 1, 1965
Public Enemy Number One, Riff Raff, frames Underdog for the largest gold brick robbery in history!
Episode 2
2. The Big Dipper, Parts 3 & 4
aired: Sat, Oct 1, 1966
Will Underdog be able to save Earth's H2O supply before Simon gains control over every last drop?
Episode 1
1. The Big Dipper, Parts 1 & 2
aired: Sat, Oct 1, 1966
Simon Barsinister invents the "Big Dipper" to scoop up all the water in the world!

