Big Brother 5, also known as Big Brother: Zero Privacy, was the fifth season of the Belgian version of Big Brother aired in the Flemish Region of Belgium on KanaalTwee.

After a three-year break, Big Brother 5 started on 26 February 2006 and finished on 29 May 2006 with a total duration of 92 days. The live shows were broadcast on Monday. A new house was built, it was completely made of glass from inside. 15 housemates participated this season. There was controversies around a housemate who was pregnant and a housemate who was diagnosed with HIV+. Concepts were "Zero privacy" and secrets. Kirsten Janssens was the winner and won €100,000.

The season was well received. Although the concept was "Zero privacy" and there were glass showers, there was less nudity this season. Director of KanaalTwee Nico Nulens called this a conscious choice because Big Brother was more than voyeurism. The revival season had more viewers than the previous season, having 355,000 ratings for the highlights and 420,000 ratings for the live shows. 607,237 viewers watched the final. because of the success of this season, a new season was announced at the final night.

Format This season launched as the revival of Big Brother Belgium after a three-year hiatus. It went back to the Back to Basics format and the nomination system as the first season. The slogan of the season was "Zero privacy". Since the previous house was demolished, a new house was built. All inner walls were made of glass, even the showers were in the middle of the bathroom and had only glass walls. It enlarged the concept "no privacy".

The central concept of the season was secrets. This season was filled with all kind of secrets: The start of the season featured a secret loft and secret housemates. Most housemates had a personal secret who were unveiled during the season. Big Brother gave secret tasks or missions to one or more housemates.

Another novelty was the concept of Big Boss. The housemates voted one of the housemates as the Big Boss at the start of the new week. The Big Boss had some personal benefits: Big Boss could live for the entire week in the more luxurious loft with a housemate of own choice. Big Boss was the first to be informed of the nominations. Big Boss could change one of those nominated housemates to another housemate (including themself). Big Boss did the group shopping.

Housemates

In a relationship before Big Brother.

Name Age on entry Hometown Occupation Day entered Day exited Result Kirsten Janssens 23 Kuringen, Limburg medical administration 1 93 David Tonnet 22 Herent, Flemish Brabant pub owner 1 93 Kevin Gadeyne 27 Blankenberge, West Flanders process technician 1 93 Haris Mpacharis/Krallis26 Kermt, Limburg barber 1 86 Bart Glazenmakers 35 Leopoldsburg, Limburg metal welder 1 79 Kenny van Quickelberghe 25 Ghent, East Flanders waiter 1 72 An Van Heeck 24 Aarschot, Flemish Brabant saleswoman perfumery 1 65 Audrey De Preter 31 Sint-Katelijne-Waver, Antwerp unemployed 1 58 Mike Van Butsele 23 Ghent, East Flanders employee event agency 1 51 Kathleen Mariën 22 Berlaar, Antwerp unemployed 1 47 Sandra De Witte 23 Temse, East Flanders accountant 1 44 Joël Van Grinderbeek 26 Begijnendijk, Flemish Brabant painter 9 30 Evi Tasset 24 Brussels student journalism 1 23 Nathalie Luckx 31 Landen, Flemish Brabant employee sales 1 16 Javier De Rycke 32 Brasschaat, Flemish Brabant singer 1 16

Weekly summary Week 1 Entrances On Day 1, An, Audrey, Bart, David, Harris, Kathleen, Kenny, Kevin, Kirsten, Nathalie, Mike and Sandra entered the house. On Day 1, Evi and Javier entered the secret loft in the house. On Day 8, Evi, Javier and Kathleen left the secret loft and joined the other housemates. Secrets On Day 1, Kathleen shared her secret; her pregnancy. On Day 1, Kenny shared his secret; he had HIV. On Day 1, Bart and Nathalie had a secret; they were in a relationship. They got the task to hide this for the other housemates. On Day 1, Sandra got the secret task to be as unsympathetic as possible so she would become nominated. If nominated, she would get a free pass and vice versa. On Day 3, secret housemate Evi got the task to join the other housemates for one task. On Day 3, An got the task to smuggle food every night to the loft. Tasks On Day 2, housemates were given their first weekly task, which required them to only sleep for 25 hours. By doing individual tasks they could win more hours to sleep. They passed the task. Exits On Day 1, the first three housemates had to evict one of the other nine housemates. Haris, Kirsten and Mike evict Kathleen. Unknown to the other housemates, Kathleen joins Evi and Javier at the secret loft. Highlights On Day 3, David and Kevin created Lekker thuis in het Big Brother-huis (Good foot at home in the Big Brother house), a parody of a popular cooking program in Flanders. Punishments On Day 4, following a short circuit, there was no power in the Big Brother house. Sandra told the other housemates about her secret mission. The camera crew heard this which made Sandra automatically nominated, by failing her task. Nominations On Day 9, only the secret loft housemates, Evi, Javier and Kathleen, were allowed to nominate. They nominated Mike and Nathalie. Sandra was nominated because of her failed task. On Day 9, Big Boss Sandra saved Mike and replaced him with Kenny. On Day 9, Kenny, Nathalie and Sandra faced the public vote. Week 2 Entrances On Day 9, Joel entered the house. Tasks On Day 10, the housemates were given their second weekly task, involving steps. Secrets On Day 12, Javier got the task to tell a murder story to other housemates. Highlights On Day 13, Bart proposed to Nathalie, who said "yes". Punishments On Day 14, angry because other housemates hid his slippers, Javier destroyed one of the windows. He was banned by Big Brother to the loft. On Day 16, Big Brother punished Javier to stay in a cage in the garden and to be dependent on the goodwill of his other housemates. The other housemates refused the punishment and thought it was too easy after aggressive behaviour. An, and other housemates, threatened to leave the house. Big Brother gave the housemates the choice if they wanted Javier to give another chance in the house. The housemates unanimously refused Javier a second chance, effecting his expulsion from the house. Exits On Day 16, Javier was forced to leave the house. On Day 16, Nathalie was evicted from the house. Week 3 Highlights On Day 16, Big Boss David and Bart became the secret duo Snip and Snap who did secret pranks with other housemates. They wrote See you. Javier with razor foam on the bathroom mirror. Tasks On Day 17, housemates were given a weekly task, which involved pregnancy tasks. They made a pregnancy fitness video, danced as teddy bears, played babies and mothers (baby An and mother Haris, baby Kevin and mother Joel, and baby Sandra and mother Kathleen), sorted out 6000 kg sugar beans and sing for expecting Kathleen. Nominations On Day 19, An, Evi and Sandra received the most nominations and faced the public vote. Exits On Day 23, Evi was evicted from the house. Evi got the choice; stay and one of the evicted housemates return or leave and nobody return. Evi was afraid Javier would be the housemate returning so she chose to leave. Week 4 Tasks On Day 24, housemates were given a task: to find a nail in a haystack. On Day 26, housemates had to lead a ring over a spiral. On Day 28, housemates had to fish ducks in the pond. On Day 29, Kirsten got to organize a Upperdare party for the female housemates in the loft. The male housemates could watch them on a television screen. Secrets On Day 24, Mike got a nail in the Diary Room and the choice: "find" it in the haystack and the group wins 60% budget, or keep the nail and win a free pass for the next nominations. Mike took the nail and hides it for putting it later in the haystack. On Day 25, Sandra was informed by Big Brother about Mike's nail. She stole the nail, put it in the haystack and "found" it. On Day 26, Kirsten got the task to boycott her team for the ring over spiral task. Nominations On Day 26, Joël and Mike received the most nominations and faced the public vote. Exits On Day 30, Joël was evicted from the house. Week 5 Tasks On Day 32, housemates received their shopped merchandise but it was locked in a cage. They could open the cage by solving riddles. On Day 35, the male housemates had to make the Big Brother logo in metal. Secrets On Day 32, Bart received the task to act like he got electrical shocks if housemates got a riddle wrong. On Day 35, David had to share his secret. He was caught stealing once when he was a teenager. On Day 36, the male housemates did a strip act. They were watched by mothers and grandmothers from the loft. Nominations On Day 33, An, Kathleen and Mike received the most nominations and faced the public vote. Exits On Day 37, Kathleen was evicted from the house. Week 6 Tasks On Day 38, the house was completely wrapped in plastic for the next task. Highlights On Day 39, Sandra asked for a pregnancy test in the Diary Room. She had to admit she had been intimate with Kevin. Exceptionally, she could phone home. Her boyfriend and father advised her to leave the house. Her brother advised her to stay. Sandra stayed. On Day 44, the housemates performed the song "Welkom in het Big Big Brother-huis", a cover-version of Clouseau, written by David and Kevin. Secrets On Day 24, Mike got a nail in the Diary room and the choice: "Find" it in the haystack and the group wins 60% budget, or keep the nail and win a free pass for the next nominations. Mike took the nail and hides it for putting it later in the haystack. On Day 25, Sandra was informed by Big Brother about Mike's nail. She stole the nail, put it in the haystack and "found" it. On Day 26, Kirsten got the task to boycott her team for the ring over spiral task. Nominations On Day 40, Kevin and Sandra received the most nominations and faced the public vote. Exits On Day 44, Sandra was evicted from the house. Week 7 Tasks On Day 45, the task had to be done in couples. On Day 46, all housemates, except Big Boss, had to wear boxing gloves. On Day 47, housemates had to do a tug of war around the swimming pool. Secrets On Day 46, Kirsten's secret was uncovered, she worked as a receptionist in an erotic pub. On Day 47, Mike has to steal one of An's bras. Punishments On Day 46, Audrey and Kirsten stole a bottle of wine from the loft. Big Brother took all the budget from the group which placed the budget at 0%. On Day 46, removing their boxing gloves to cook, Big Brother punished the housemates by locking them in the garden. Nominations On Day 47, An and Mike received the most nominations and faced the public vote. Exits On Day 51, Mike was evicted from the house. Week 8 Tasks On Day 52, all tasks were in wedding theme; a dance marathon, a soft SM task, creating a Big Brother 2006 cocktail (it was Kirsten's cocktail which was voted the best). On Day 55, the housemates had to make a painting of themselves. Secrets On Day 51, Kirstens was informed Bart and Nathalie would marry this week but she had to keep this hidden for Bart. On Day 52, Kirsten was allowed to tell Kenny about the wedding. On Day 54, An and Audrey are informed of the wedding by Big Brother. They had to think about pranks for the wedding night. On Day 55, Haris and Kevin are informed of the wedding. They had to write a speech. On Day 55, Kenny and Kirsten got the task to decorate the loft for the wedding night.