In the very first live launch for Big Brother Australia, join Gretel Killeen as she introduces the first housemates of the year - and the first major twists.

It's a stark welcome for one of the new housemates as Ben finds himself in solitary confinement. Confusion reigns in the house with a split personality as Day 1 delivers more questions than it does answers.

Gretel is joined by Big Brother 1's Blair and Big Brother 2's Marty as two more housemates enter the Big Brother house. The question is: WHICH Big Brother house?

Noisy Carlo annoys the neighbours and Vincent has some advice for him as well, while the houses reveal their differences.

The chess game continues as Big Brother makes his next move.

New boy Patrick gets an early lesson in house hierarchy, Carlos' mouth gets him in trouble again, and Regina gets straight to the point.

Big Brother ups the stakes as two more housemates enter the houses.

Reality starts to bite with friction in the air, and affection too, as the housemates begin to discover who they click with and who they don't.

The final three housemates enter the Big Brother houses.

Fourteen housemates start to get comfortable with each other. Is it all good fun or are some of them going too far? Plus, there's first contact as the houses swap notes.

Tim Ferguson breaks down the week's events with his panel of guests - comedienne Ciel Stowe, the Herald Sun's Luke Dennehy, NW's Fleur Michell, TV Week's (and Big Brother 1's) Peter Timbs, Big Brother 2's Sahra Kearney, and commentator Party Parslow.

The party's over but the fun is just beginning. With just one week until the first eviction, tomorrow's nominations are the topic of conversation. Gretel Killeen breaks down the who, what, when, where and why, and is joined by Big Brother 2's Marty and Jess, Big Brother psychologist Dr. Carmel Hill, and Big Brother showrunner Peter Abbott.

Two housemates talk of quitting, tension begins to mount after one week under the same roof, and the confessions start.

Both the Round House and the Square House face their first round of nominations. Who will face eviction?

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Tears flow as two of the girls find it all too much. The housemates go shopping for the first time and Saxon's not happy, and neither is Ben, but is he serious?

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Five housemates find out they're up for eviction. There's fun and fire drills in the Square House, and next door there's jealous neighbours.

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There's rebellion in the Square House, as Irena tries to win support of a mass walkout. Carlo's feud with Belinda erupts, and Joanne's giving Patrick plenty of attention, but will she regret it?

Rude or prude? Housemates face the challenge of the communal shower. The Italian stallion Carlo talks the talk, and Regina redesigns mens' private parts.

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Joanne offers an intimate insight into her long-term relationship, Leah and Ben go to war over the groceries, and the housemates reveal their hidden talents.

Tim Ferguson breaks down the week's events with his panel of guests - NW's Fleur Michell, TV Week's (and Big Brother 1's) Peter Timbs, Big Brother 2's Brodie Young, entertainment journalist Angela Bishop, lawyer and comedian James Smith, and commentator Party Parslow.

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Catch up on the action from the houses from over the weekend.

Irena, Belinda, Saxon, Benjamin, Leah. Who goes? You decide.

The Square House is in turmoil, while the Round House is partying. On the other side, Belinda feels like an uninvited guest.

After last night's nail-bitingly close eviction, the pressure's on as the housemates nominate once again.

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