Oggy is sprinkling the hedges in his garden when he sees a cat, who looks exactly like him, walk past him. He is amazed and he invites the cat over for a cup of tea. The cats look at each other: they are look-alikes! Jack shows up at Oggy’s house...Official Synopsis, 
Oggy's Double is the 37th episode of Season 3.
Oggy is watering flowers happily while another blue cat with white tip of the tail goes by his house. He greets blue cat, who surprisingly comes back, and they both stare at each other in astonishment. They match their features then they see a minor difference in the tails. They are relieved that there is "some" difference between each other. While Oggy invites Tony into his house, Bob sees both of them, and faints.
Jack arrives at the house with a bag. He sneaks in a room and finds blue cat with white tip of the tail relaxing on the sofa. He scares him by shouting at him. The blue cat with white tip of the tail gets scared and then Jack smacks him on the back, creating a perforation of his hand on the cat's back. Then he takes out a stone age-style underwear and shows it to blue cat while showing off six-packs, to that blue cat's shock. When Oggy comes in, Jack sees the both of them together. His eyes fall on his tongue in confusion and shame, and Jack faints.
When he wakes up, he is in bed, with Oggy watching him. Jack jokes that he had become gone-case and they both laugh at the joke. The blue cat with white tip of the tail joins in laughing, scaring Jack, causing him to jump off the bed and hangs on the ceiling. Oggy pulls his tail to make him come down and he accidentally lands on Oggy. Oggy approaches blue cat with white tip of the tail with Jack yet squishing on Oggy's shoulder. Oggy says that white tip of the tail of blue cat and my tail are the difference in us. Jack's eyes move like circuits as if a machine has started working. He squeezes their noses to see and laughs. Oggy decides to play a deadly prank on roach gang. He whispers to them and Jack forces roach gang to wake up by a loud horn, saying BAD-MORNIN! The roaches peep from their house angrily, and see Jack talking to blue cat with white tip of the tail about going far away for fishing. They cheerfully raise their hands and approach the fridge. Dee Dee pulls out a chicken with a zip. From the chicken comes Oggy and swats them. Injured, they run back to their base. Oggy's partners came and asked if it was a good one. Oggy said that the plan worked and Jack said he had another plan. Operation Poor Roaches Plan#2.
"Oggy" took a rake and began gardening. The roaches watched, and Marky and Dee Dee told Joey he should go. Joey went talking happily saying that now he will clean the kitchen. He opens a mini-cupboard and inside comes the Real Oggy who smacks Joey. Joey comes back badly injured and slaps his pals, scolding them. Dee Dee angrily said that Catty is out! Joey's eyes open wide seeing "Oggy" cutting leaves out there. Then comes Plan#3 but this time it starts with the cockroaches, Joey gives his friends a Walkie-Talkie and says to keep messaging until Catty is not outside, Over and Out! Over-acter.... Marky said. Joey approaches the fridge and opens it. He pulls out an Oggy, but wasn't worried. He first checked if he was real, by examining his mouth, nose and ears, then ran. He scolded his friends angrily on his walkie-talkie and Dee Dee replied that "Oggy" has just fixed a bicycle in garage, over and out and in! Joey hides in the bathroom where he also finds Oggy, sitting on the bathroom. Joey screamed and broke out through the door and ran upstairs in the attic. He put a big box over the entrance of the attic, and again began angrily lecturing his friends. Dee Dee replied that "Oggy"; the blue cat with white tip of the tail, greeted Bob, relaxing. Joey is very chagrined then suddenly, he sees above, to horror, Oggy sitting on the box, whistling. Joey gave a shrill scream of scariness and ran up from the ceiling and ran away to the urban city. Joey enters a ladies shop named Madam and hides from mannequin to mannequin and sees in horror a female Oggy living dummy greeting. He did the same thing as he does when seeing Oggy everywhere, and went in a taxi. The moment that Joey tells the driver to take him somewhere, he immediately sees that even the driver is Oggy, who smiled. The view came from outside the Taxi and Joey screamed like a girl. Joey is then seen Scuba Diving while Oggy comes there too, with a Water-Dozer submarine and picks up Joey's Oxygen tank and turns it quickly that the oxygen fills in Joey. Joey gets inflated and begins flying, saying Oggy can't come here, but Oggy came here too, like an angel on a cloud, and popped the cockroach with a soft-board pin, and he flew away. Then, Joey is seen walking on the moon and waves bye to Earth (or say to Oggy) and picks out a coin and inserts it in a soda machine, there. Out comes a soda can with Oggy's face. Tears of madness escaped Joey's eyes and he lost his brain completely.
He did mad things in his house, due to that he was tied and sitting in a paper sheet corner. They here Double Oggy laughter and sees them laughing over their heads, Oggy and blue cat with white tip of the tail high-five each other and say bye-bye. Blue cat with the while tail tip leaves. Joey then furiously sets bombs in the vent, which explode, blackening Joey. He comes out of the house but then notices around 20 Oggy's together in a bus, causing him to faint in shock and fear. As Oggy and Jack come out, blackened as well, they notice the bus as well, but the Oggy's just turn out to be laughing kids wearing Oggy heads in the bus with a banner mentioning 'Oggy Fan-club'. Oggy and Jack laugh as the episode ends.
- There's a deleted scene in this episode. When Joey finds out that Oggy follows him in space, there's a part that his head exploded. But since it was deleted in most countries, the result is an alternative scene where he cries.
- There's also a deleted scene where Joey brings explosives.
- The Oggy Fanclub bus has 666 on the front of it.666 is the Devil's number, and how they got away with using said number is unknown. Although some countries either banned the scene or edited out 666.
- ↑ Oggy and the Cockroaches - Oggy’s Double (S03E34) Full Episode in HD (published by OGGY on Jan 12, 2016, on YouTube. Accessed Apr 21, 2019.)