Night Watchmen is the 3rd episode of Season 3. The cousins are left in charge of a toxic plant; while Jack sleeps, Oggy has to take care that anything wrong doesn't happen while the roaches cause chemical havoc!
Oggy and Jack are night watchmen in a nuclear power station. The roaches don’t want to miss that! They go in the control room, and in two ticks, all the warning lights turn red! Oggy chases after them and ends up in the heart of the reactor...Oops!Official Synopsis, 
The boss tells that they are in charge of a toxic plant and make sure no monkey business will make this plant go nuclear. They accept it, but Jack only wants to sleep. Then Oggy sees the cockroaches, going up to the second floor. The cockroaches jump into an open barrel of toxic poison. Oggy then falls into the barrel, while the cockroaches melt. They are now shapeless, so they went into a washing machine. Surprisingly, they end up turning into clothes, then animals, and finally Etno, Bud, Candy and Gorgious except for Stereo from the show, Space Goofs. They then turn back to their normal selves, and when they do, Oggy buries the roaches. Jack then lazily wakes up. He then thinks he wants a coffee and adds a very little drop of a nuclear liquid. Then the toxic plant blows up!
- ↑ Oggy and the Cockroaches - Chatter Box (S2E156) Full Episode (published by OGGY on Sep 11, 2018, on YouTube. Accessed Sep 9, 2019.)