[citation needed] Auditions were held throughout November and December 2006, taking place in Brisbane, Sydney, Melbourne, Adelaide, Perth, Hobart, and Darwin.

On 29 January 2007, Network Ten, Endemol Southern Star, and Masterfoods announced "Australia's biggest ever integrated television promotion", the Big Brother Starburst Golden Key, which would allow a member of the public to enter the Big Brother House as a housemate.

[6] Unique alphanumeric codes were included in packs of Starburst, a confectionery manufactured by Masterfoods.

On Day 18, Nick Sady was announced the "Golden Key" winner and entered the Big Brother House.

[9] The winner of Friday Night Live this season was also given the chance to discuss their nominations, both past and present, with their chosen housemate whilst inside the Rewards Room.

It was situated in the lounge and was shown on the Opening Night broadcast before the housemates entered the house.

[11] On Day 58 Andrew picked up the phone as a joke, and was penalised by being sent to the Punishment Room to polish boots.

Michelle joined him in the Punishment Room due to the weekly task which involved housemates remaining partnered.

On 23 April 2007, the four remaining wild-card housemates not selected to enter the House via the public vote on Days 1 and 2 were isolated in the "White Room".

This decision to leave was final and the quitting housemate could not return to the Big Brother House or the White Room.

[14] In the days after Cruz departed no one else volunteered to leave, so Big Brother ran a set of challenges to decide who from the White Room would move to the main house.

Big Brother set the task to both housemates to enter the house and keep their relationship secret for one week.

Billy is Hayley's former boyfriend and was added specifically to complicate her task of keeping her relationship with Andrew secret.

Each day he received a mission from Big Brother to put pressure on Hayley's secret challenge.

As fewer than half of the housemates had guessed correctly, Big Brother deemed Hayley and Andrew as successful in their challenge so both were allowed to stay.

Big Brother also revealed that as Hayley and Andrew had completed their task successfully $50,000 had been awarded into the prize pool.

As of 2007 Rove aired on Sunday nights at 8:30, immediately after the Big Brother eviction show.

With the tally counted, Michelle had the most votes from the public and so received an extra two nomination points.

As winner of Friday Night Games Daniela had the power of saving one housemate from eviction.

In a promotion for the upcoming season of Australian Idol, Kyle Sandilands entered the House as a celebrity guest with a mission from Big Brother to encourage housemates to "be themselves", but left the House early due to a severe migraine.

Hayley and Andrew were deemed by Big Brother to have successfully kept their relationship a secret from the housemates for the week (fewer than half of the housemates had successfully guessed their relationship) which meant they could both stay in the house.

Big Brother also revealed that for succeeding in their task they had earned $50,000 to be added to the prize money, which was previously set at zero.

Big Brother also tempted the wildcard housemates to leave the White Room by offering a sum of money to them (A$750), which Cruz accepted.

The show's producers had selected five finalists from the original 100 Golden Key winners after an intensive audition process.

"The Works" was a scheduled Big Brother special focusing on behind the scenes footage that was planned to air on Day 46 (6 June 2007).

"Kyle in the House" was a special version of the daily show that aired for 60 minutes before Live Eviction 11 on Day 85 (15 July 2007).

The season finale aired on Day 100 (30 July 2007) in which Aleisha was announced the winner and Zach the runner-up.

[40] Crikey's media reporter Glenn Dyer stated that Ten's reported figures were exaggerated, and that the average number of viewers was 1.791 million for the entire show, not 1.9 as Ten had stated, which only accounted for 8.30pm – 10pm.

"[47] The Sunday Herald Sun said that the show "has committed the worst television sin – it is boring.

[50] One review in The Age praised the series, pointing out the highlights of the season and claiming "[Big Brother] is as enjoyable as watching a quality sitcom or drama".