The content on the food tray the delivery woman brings is shown to be: flowers, a newspaper, an empty glass, and a plate of food. When Hallandsen delivers the news about the stolen briefcase, a beer bottle has magically appeared on the tray.
Egon says that he's known Benny, Kjell and Valborg for 12 years. In Olsen-banden og Dynamitt-Harry (1970) Benny mentions that they've know each other since 1962, which would make it 20 years.
The newspaper Hermansen is reading at the end of the movie has the date Tuesday, June 8th, No. 128, but the following newspaper with Egon's photo say Thursday, June 3rd, No. 124. The order of newspaper is correct but the dates are in reverse.
Both scenes inside Biffen's office use stock footage of the guard dog from Olsen-bandens flugt - over plankeværket (1981), and a red blanket on the floor is shown. In the new scenes featuring the actors, the blanket is blue.
The newspaper Benny steals has the date Descember 18th, 1981. But the one behind it has the date April 15th, 1982.
As Benny and Kjell are on their way to save Egon, it's clearly doubles in the car. Benny's double is clearly younger and Kjell's double can be seen covering his beard with his hand.
When the car makes a turn at a crossroad at the beginning of the movie, an obvious much-younger double for Egon is seen in the passenger-seat.
Twice in the movie does Egon gain information he couldn't possibly know.
After being knocked out by Biffen and tied up, and then saved by Benny and Kjell, does Egon suddenly know that Hallandsen is on his way to the airport and needs to be stopped. How? He's out cold the entire time, and doesn't overhear any conversations from Bang-Johansen, Hallandsen or Biffen.
At the end of the movie, Egon knows every detail of Bang-Johansen's next move; which hotel he's staying at and when he's leaving for Paris the next day. How could Egon possible know these details? Bang-Johansen mentioned that he was traveling to Paris himself right before Hallandsen left for the airport, Egon then steal the briefcase and visit Bang-Johansen at his office face to face, and then gets knocked out again. Nowhere between any of these events does Egon gather information of Bang-Johansen's plans, and the briefcase only contained a concealed envelope with contracts and files about the weapon sales.
After being knocked out by Biffen and tied up, and then saved by Benny and Kjell, does Egon suddenly know that Hallandsen is on his way to the airport and needs to be stopped. How? He's out cold the entire time, and doesn't overhear any conversations from Bang-Johansen, Hallandsen or Biffen.
At the end of the movie, Egon knows every detail of Bang-Johansen's next move; which hotel he's staying at and when he's leaving for Paris the next day. How could Egon possible know these details? Bang-Johansen mentioned that he was traveling to Paris himself right before Hallandsen left for the airport, Egon then steal the briefcase and visit Bang-Johansen at his office face to face, and then gets knocked out again. Nowhere between any of these events does Egon gather information of Bang-Johansen's plans, and the briefcase only contained a concealed envelope with contracts and files about the weapon sales.
In Egon's plan he says they need a key to get into the vault because it has a Japanese super-door. When they break into the vault it visibly reads 'Francis Hunter.' In Olsenbanden og Data-Harry sprenger verdensbanken (1978). Egon mentions that Francis Hunter is an American safe-maker.