Kathleen was pregnant when she entered the house and it was the intention to give birth in the Big Brother House.
In 2006, Bart and Nathalie had a relation before they entered the house and had to keep this a secret for the other housemates. Eventually they got married during that season and the wedding party and wedding night took place in the Big Brother house.
In 2001, Bart and Katrijn started a relation during their time in the house.
In 2001, a new room was build: an isolation room.
In 2001, a week after 11 September, the housemates were informed about the attacks of 11/9 because one of the housemates' uncle (Irena's uncle) died in the WTC-towers.