The 4th series opens with a new shop and 4 new delivery boys. Kev the Kiwi - an ex-bouncer Chong Fat - who is a terrible driver Junior - a psychotic apprentice chef and DJ BJ - a terrible DJ. Pauly and Habib are still working for Bobo and while gets a new car the new delivery boys get scooters.

Pauly's car gets confiscated by the police and destroyed. He then buys a new car, DJ BJ breaks Bobo's pizza oven, by hooking up his turntables. With the oven broken, Bobo is forced to ring Pizza Shack to order pizzas for his customers. Habib rips off a Christian family and a gang war between Kev the Kiwi's Maori gang and Rocky the Lebanese Rambo's Lebanese gang, causes problems for Fat Pizza.

We visit Hong Kong and Hashfield Heights. It’s Father’s Day and Bobo is giving away screwdrivers as part of a Father’s Day promotion. The pizza boys reminisce about their dads. Kev the Kiwi remembers his first beer with his dad. We learn the whereabouts of Habib’s father and Pauly reflects on his dad Alfredo, who disappeared when he was five. We learn that Alfredo Falzoni was the basis for Ian Fleming’s anglicized James Bond. Alfredo, the Maltese James Bond, was trained in espionage by the British after World War II. We discover secrets about the JFK assassination, Bruce Lee, Area 54, dead aliens, Harold Holt, Gough Whitlam and the moon landing. It's retro, conspiracy Pizza at its best. Cameos include Bessie Bardot, JFK, Marilyn Monroe and Bruce Lee.

Pauly catches Bobo in a compromising position with a transvestite. He blackmails Bobo into giving him a holiday, so Pauly goes to visit his cousin Luigi in Rome. Luigi sends an sms to Pauly that he has a Ferrari but he, in fact, only has a scooter, he tells Pauly he lives in a giant apartment but it's tiny; he also lies saying that he owns a nightclub when he is only the bouncer. Pauly is robbed by gypsies and loses all his money so Luigi gets him a job with a local Roman pizzeria. Pauly's new boss is Momo. Pauly then battles Roman traffic, horny old customers and the mafia.

Pauly arrives for work at Momo's pizza shop only to be sent on a mafia mission to Sicily, with his cousin Luigi. Pauly and Luigi encounter sex, drugs, horny gay guys and organized crime as they scooter their way across Italy.

Bobo decides to hire a waitress to help in the shop and all Pizza boys are drooling over her.

Pauly and Habib take a sickie and go to Queensland to compete in a drag racing competition, Rocky, Toula and Rocky's girlfriend Katrina come along too. Pauly has the hots for Katrina while Rocky treats her badly.

Toula is pregnant and Habib must marry her. Bobo is hired to cater for the wedding, with his Fat Pizza workers as staff at the reception. Possibly the most hectic, violent wedding ever on Australian television.

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