Big Brother Australia 2005, also known as Big Brother 5, was the fifth season of Big Brother Australia, and was aired on Network Ten in Australia, and TV-2 in New Zealand with a four-week delay. The series started on 8 May 2005, with housemates going into the House the day before, and finished on 15 August 2005, lasting 101 days. The theme of the series was "single, sexy, and competitive". Auditions for housemates were held in March 2005. In a departure from usual procedure, candidates were not required to send in videos of themselves as had been the case for prior auditions. Instead, the producers toured major Australian cities and conducted interviews. They searched for sexy singles that were willing to have sexual relations on camera. Promos for the show suggested that Big Brother would be different this year, and phrases such as "Assume Nothing, Expect Anything", "Let's Play", and "Think Again" were used throughout the series, especially during Opening Night. The winner announced on the finale was watched by 2.282 million Australian viewers.
On Opening Night, it was revealed that $5,000 Australian dollars would be subtracted from the $1,000,000 prize money every time the housemates broke a rule. Such rules included discussing nominations, which must remain secret, not giving adequate reasons for nominating, and forgetting to wear microphones at all times. Michelle was known for being the housemate to get the most such fines - $65,000. Geneva had the least amount of fines $15,000, two in the early days at the house and one near the end of her eviction.
It was revealed that twins would be entering the House, regularly changing places without the other housemates knowing. Greg and David entered the House as a single person named Logan (their shared middle name). Their task was to remain undetected for two weeks while swapping places at Big Brother's command. The secret of the twins was discovered one week into the series by housemate Glenn, and this was revealed during Lies Exposed.
As a result, both Logans were able to continue living in the House, but would be treated as a single person in matters such as evictions and nominations. Late in the series a special eviction was held where one twin was evicted based on the votes of the other housemates, and the remaining twin allowed to continue in the House as a normal housemate. During this eviction process, David was evicted. However, because Greg was the last housemate to be evicted, both David and Greg shared the prize equally.
^Note 1 : As punishment for lying during the audition process, Constance, Dean and Nelson were fake evicted and sent to the Holding Room. Believed to have been evicted, they could not be nominated by their fellow housemates. On Day 9, they were informed that all three of them would be facing the public vote; Constance and Nelson were evicted the following evening.
^Note 2 : Dean faced the public vote alongside nominees Angela, Geneva and Tim as a result of his previous rulebreak (see note 1).
^Note 3 : As new housemates, Rachael and Vesna were exempt from nominations and could not nominate or be nominated.
^Note 4 : As new housemates, Heath, Melanie and Rita were exempt from nominations and could not nominate or be nominated.
^Note 5 : On Day 59, the housemates had to decide which of the three intruders they wanted to keep in the house. They collectively decided to save Rita. Heath and Melanie then faced the public vote in a special Intruder Eviction; Heath was evicted later that night.
^Note 6 : Housemates nominated for tenth time in fake nominations. Unbeknownst to them, their nominations didn't count, and it was revealed after nominations took place that all housemates would be facing the public vote. In the second twist of the night, Friday Night Live winners David & Greg (the Logan twins) were given two boxes, with one containing a card displaying "Not Nominated", and the other containing a card displaying "Nominated". They selected the latter box, meaning that they faced the public vote alongside their fellow housemates. Four days prior to the eviction on Day 74, the housemates each had to vote to evict one of the Logan twins in a special live eviction show. The votes were as follows:
Christie – David
Melanie – David
Tim – David
Vesna – Greg
Rita – David
Kate – Greg
^Note 7 : All housemates faced the public vote in the final week; the housemate with the fewest votes to evict on the final night was declared the winner. A special eviction took place on Day 99 in which Vesna was evicted, after having received the most votes to evict.
On Day 0, each housemate was called to the diary room and asked to pick another housemate to not receive their suitcase for the duration of their time in the house. Constance had the majority and lost her suitcase. The voting went as follows:
Heath was given a strike on Day 57, for his abusive behaviour on Day 56.
Heath was evicted on Day 59 in Intruder Eviction.
The Logans won Friday Night Live on Day 62, and they took Dean to the Rewards Room. The theme was life in space. Christie was the runner-up.
Hotdogs was evicted on Day 64.
On Day 65, it was announced that Kate, Logan, and Rita were up for eviction. The Logans used their Three Point Twist on themselves, changing the final line-up to Dean, Kate, Rita, and Tim.
The housemates were given a tapdancing task on Day 66. They had to learn how to tap dance.
Logan won Day 69's Friday Night Live, and took the Christie to the Rewards Room. Christie was the runner-up. The theme was winter wonderland. This week is notable for the boys offering to give up their position to Christie and allowing her to take someone else. She declined and admitted that she would've chosen the boys anyway
On Day 70, the housemates had to give a final performance, that decided whether or not they passed their test. Big Brother later announced that he was impressed by the performance, therefore the housemates have passed their task.
Dean was evicted on Day 71.
Big Brother told the housemates on Day 72 that they had to form the "Big Brother Brigade" as part of their Survival task. The housemates decided to wager 100% of their budget.
All housemates were up for eviction this week, but Big Brother gave the Logans the opportunity to save themselves, as the winners of Friday Night Live. They were given two boxes, and were told to pick one. They picked the box that means they are nominated, but they would not find this out until Sunday.
David was evicted in a Surprise Twin Eviction on Day 74.
Big Brother told the housemates on Day 75 that they would have passed their task if they did not swear so much, and if they did not shout instructions to the other housemates when they were to do something without help.
Tim won Day 76's Friday Night Live, and he invited Vesna to the Rewards Room. Melanie was the runner-up. The theme was DIY.
As part of his prize, Tim won a family message. He gave it to Kate.
Christie and Rita were evicted in a double eviction on Day 78.
As part of the housemates' new task, announced to them on Day 79, they had to make a movie. They wagered their whole budget on it.
The housemates up for eviction are Greg, Melanie, and Vesna. After Tim uses his Three Point Twist on Greg, housemates nominated for eviction are Kate, Melanie, and Vesna.
On Day 83, the housemates were invited to watch their movie. When the movie had finished, they were told they had passed their task.
Tim won the Friday nght games. Greg was the runner-up. Tim took Greg to the rewards room. The theme was Australian.
Vesna was told on Day 84 that she had to host a dinner, but keep her mission a secret. If she succeeded, Big Brother would provide her with a sweets pack.
Kate was evicted on Day 85.
Housemates nominated for the last time on Day 86. Logan Greg, Vesna, and Tim were up for eviction. Tim used his Three Point Twist on himself, and changed the eviction line-up to Logan Greg, Vesna, and Melanie.
Big Brother set a task on Day 87. Housemates had to be chained together at the wrist.
Melanie and Tim's chain broke on Day 88, and Tim wanted to find out if they had failed the task because of it. Big Brother said he would tell the housemates later.
Big Brother announced a bowling tournament, as the housemates were bowling at the time. Tim and Melanie won, and their prize was chocolate. They were not allowed to share it with any other housemates.
On Day 89, Vesna deliberately broke her chain, and tried to convince the other housemates to give up on the task. Big Brother later switched the chained pairs and punished them for being disobedient.
Day 90's Friday Night Live was an All-Stars game, and Bree, Ryan (Fitzy), Paul, and Wesley, all from Big Brother 2004; Joanne (Jo) from Big Brother 2003; and Jessica (Jess) from Big Brother 2002, all competed in the games. In this game, the housemates were given the opportunity to win back some of the prize money they lost in fines. At the end of the games, they received a $20,000 cheque.
Big Brother announced to the housemates on Day 90 that they had failed their chain task.
The housemates were given a task to build a tower, and the team with the highest would win a takeaway meal. The housemates had to work with whomever they were chained to, as teams.
Melanie was evicted on Day 92.
Nadia Almada, winner of Big Brother 5 UK, entered the House on Day 93 as a house-guest. She was served dinner by the housemates, but they were soon discussing the fact that Nadia used to be a man.
Nadia left the House on Day 95, after she was given framed photos of her time in the House. She was given the opportunity to record a goodbye message, similar to what housemates up for eviction do every week. She started the message by saying she hated all the housemates and that they were the worst people she had ever met, then left the screen. After a short while, she returned on screen and said that was a practical joke, and that she loved everybody really.
The housemates finally received their video messages from their families and friends on Day 96.
Vesna was evicted on Day 99.
Tim and Greg both left the House on Day 100.
Greg Mathew was announced winner of Big Brother 2005, and $836,000 for himself and his twin brother David.
"Live Surprise" was a live show broadcast on Day 2. During this show, the Logan twins swapped places with each other for the first time. They were given two minutes in the Diary Room to exchange as much information as possible, and Greg then had to go to the Isolation Room while David went into the Big Brother House. The Daily Show was broadcast as a part of Live Surprise. Hosted by Gretel Killeen.
"Lies Exposed" was a show broadcast on Day 8. After Glenn's discovery that Logan was in fact two twins, this was revealed to all of the housemates. Before this, Constance, Dean, and Nelson were all evicted to the Punishment Room; and were told their fate by Big Brother. Hosted by Gretel Killeen.
"Viewers Verdict" was a live show broadcast on Day 10. This special was aired because Constance, Dean, and Nelson, had all lied about their relationship status. A public vote was held, that was started on Day 9 and was closed during the show, minutes before two of these housemates who had broken the rules were evicted. Constance and Nelson were evicted in this show, and were reunited with their partners. They both had separate eviction interviews with Gretel, and were both told that because they had deceived Big Brother, they would receive no prizes. Dean was safe, but Big Brother still punished him by banning from nominations and by putting him up for the public vote next week.
"Housemates: Incoming!" was a live show broadcast during Day 25, where replacement housemates Rachael and Vesna were introduced to the public and put in the House.
"Intruders Arrive" was a live show broadcast on Day 53, where Intruders Heath, Rita, and Melanie entered the Big Brother House.
"Intruder Eviction" was a live show broadcast on Day 59. The housemates were given 1 minute 30 seconds to discuss amongst themselves which of the new Intruders, Heath, Melanie, and Rita, they wanted to keep. They decided to keep Rita, so Heath and Melanie were put up for eviction. As the public SMS vote started and finished during the show, lasting only twenty minutes, viewers in Western Australia, South Australia, and the Northern Territory were not able to vote as television shows in Australia are broadcast with a delay depending on the state to compensate for differences in Australian time zones. Heath received the most votes and was evicted. Hosted by Gretel Killeen.
"Surprise Twin Eviction" was a live Eviction aired on Day 74. With David and Greg both living in the House as a single housemate, the twins were put up for eviction as two separate people. David was evicted. Hosted by Gretel Killeen.
A special All Stars edition of Friday Night Live took place on Day 90. Greg, Melanie, Tim, and Vesna all competed against a team of ex-housemates to try to win a A$20,000 addition to the prize fund. The team they were competing against was Paul and Wesley from Big Brother 2004, Joanne from Big Brother 2003, and Jess from Big Brother 2002; and if they won Friday Night Live, they would win the $20,000 in the form of $5,000 each. Bree Amer and Ryan Fitzgerald, Friday Night Live co-presenters and former Big Brother 2004 housemates, participated in one of the games, each as an additional member of one of the teams. The All Stars team won the Friday Night Live.
"The Final Countdown" was aired on Day 93. In this show, Nadia Almada, winner of Big Brother 5 UK, entered the Big Brother Australia House as a house-guest. Hosted by Gretel Killeen.
"The Prize Fight" was a special Friday Night Live that aired on Day 97. The remaining housemates were given the opportunity to win back some of the prize money they had lost in fines.
"The Final Sunday Eviction" was the last Eviction of Big Brother 2005, and was aired on Day 99, the day before The Finale. Vesna was evicted in The Final Sunday Eviction. Hosted by Gretel Killeen.
