The airport location is seen in episodes 235-238 of season 3 - part 1 and in episodes 369-370 of season 4.
This location is first seen at the beginning of season 3 - part 1, when Patricia and Joyce return from their vacation. Rufus is keeping an eye on them. Little Robbie is too late to wait for Patricia and Joyce and is taken away by security because he waits for a long time with a "suspicious package." Nienke, Amber, Fabian, and Appie also arrive at the airport when they return from Egypt.
In season 4, Patricia and Joyce return to the airport. This time to leave for America, where they will study for a year. Around the same time, Jeroen leaves for Egypt to look for two pieces of papyrus.
The filming took place at Antwerp International Airport in Belgium.
