A comedy about a Danish private detective, normally just occupied with cases about unfaithful spouses, is suddenly involved in murder, arms deal, revolution in Guateragua, briefcase full of money and the Danish intelligence agency.

The Olsen Gang becomes millionaires. Unfortunately for the gang, their arch-enemies, the King and the Jack, are planning to steal the money for themselves.

Egon returns from prison with the key to a big heist, a hidden Nazi-treasure. The Olsen Gang finds the location of the treasure, but problems arise when the international criminals Carina and Ricco shows up.

A Chinese diplomat is kidnapped from a conference in Genève and the world peace is at risk. The trail leads to a hiding place in Denmark and the Danish secret service brings in their best agent, agent Smith, who has been in a psychiatric hospital since his last assignment. To accompany Smith they once again turn to novelty and party tricks salesman Frede Hansen, because they need an unrecognizable man to infiltrate the crime syndicate behind the kidnapping.

With the help of a corrupt diplomat the Olsen Gang plans to rob the World Bank, with help from the re-schooled Dynamite-Harry, now a computer expert.

Egon Olsen is the leader of the Olsen Gang. While he was in the slammer, he planned how he would steal the fantastic golden figure Keizeroppzatsen.

Egon escapes from the psychiatric ward, where he has been incarcerated since the gang's last coup. Keld and Benny pick him up, and when Egon, as always, is planning the big heist, the Olsen Gang is once again on the move.

Egon and his two cronies managed to sneak a fortune with them to Spain. Here they live a life in a whirl of pleasures, but they are not truly happy. While Egon always has the money chained to him, Bøffen still manages to steal them. Egon ends up in jail once again, and when he comes out, he has a brilliant plan.

Some criminal EU ministers plan to turn Denmark into a gigantic fair ground and holiday paradise. Egon gets his hand at some important documents which could both make him rich and take care of Denmark's future.

The Olsen gang in Jutland. Ones again Egon Olsen has a plan when he gets out of Vridslose State Prison. He has found out that the Germans left a large sum of money (in American dollars and gold bars) in one of their commando bunkers, when they were defeated in 1945; the only problem it's in Jutland. Egon, Benny and Kjeld "appropriate" a car and drives to Jutland along with Kjelds wife and child Yvonne and Borge. They look forward to fooling the the people in Jutland, but of course, things don't go quite as planed. It ends with Benny, Kjeld, Borge and Yvonne sitting in the train back to Copenhagen, were they are overtaken by Egon in his car on the road next to the track. This is the last time the Olsen gang goes to Jutland.

A good looking female social welfare worker makes Egon Olsen forget about crimes for some time, but when an American gangster breaks into a local bank and the police think its Egon's work, he has to get back to work to prove he's innocent.