The World Underneath is the 18th episode of Season 3. The cockroaches trap Oggy underground, and pale bugs are gonna feast on him! When Jack learns of this, he makes the roaches go underground and save Oggy from those creatures. Will they?
The roaches lock Oggy up under the house’s floor and our hero discovers a whole new world. Thanks to a mini camera, Jack realizes that his cousin is held hostage by albino roaches, planning to eat him for diner...Official Synopsis, 
Oggy was chasing the whole chicken with the cockroaches, but he was tripped and fell underneath the house so the cockroach crew trapped him. Meanwhile, Jack came into his house. He didn't know that he is underground so he called the robot to follow the footprints of the pale bugs. Jack wants the cockroach crew to send him back and THEY REALLY SEND HIM BACK! BUT the contract that Jack signed that he'll be a ballerina, and Oggy eats the apple episode ends.
- ↑ Oggy and the Cockroaches - The World Underneath (S3E20) Full Episode in HD (published by OGGY on Mar 5, 2015, on YouTube. Accessed Sep 9, 2019.)