第 13 季 共 32 集
播出时间：2021年4月27日
第 1 集 Episode 1
播出时间：2021年4月27日
Twelve brand new housemates arrive, determined to beat Big Brother at his own game. As they get to know each other, they have to contend with Big Brother’s new house, new playground and new tricks.
第 2 集 Episode 2
播出时间：2021年4月28日
After an explosive eviction, new friendships and alliances solidify. But little do they know, eight new housemates are descending via BB Air and they’re about flip the game on its head.
第 3 集 Episode 3
播出时间：2021年4月29日
It’s party time as housemates old and new get to know each other. But as alliances form, battle lines are drawn. Who will be next to leave the Big Brother house? Big Brother is hosted by Sonia Kruger.
第 4 集 Episode 4
播出时间：2021年5月3日
Get ready for a week of surprises, but they’re not necessarily all good ones. Which surprise will shake up the entire house? Big Brother is hosted by Sonia Kruger.
第 5 集 Episode 5
播出时间：2021年5月4日
It's surprise after surprise as Surprise Week continues. As one housemate’s position hangs in the balance, will his big mouth be his downfall? Big Brother is hosted by Sonia Kruger.
第 6 集 Episode 6
播出时间：2021年5月5日
Big Brother has the hungry housemates run off their feet and it's a battle royale as carnivore and vegan go head to head.
第 7 集 Episode 7
播出时间：2021年5月6日
Surprise Week ends with the biggest shock of them all when Big Brother’s secret attic is revealed!
第 8 集 Episode 8
播出时间：2021年5月10日
It’s Big Red Button week and the housemates have to decide whether to push or not to push. With all housemates on edge, someone has a plan to change things up.
第 9 集 Episode 9
播出时间：2021年5月11日
The Big Red Button is in the house and no-one knows if it will bring punishment or reward. As reality hits, loyalties are tested and the determination to win is greater than ever.
第 10 集 Episode 10
播出时间：2021年5月12日
As Big Red Button week continues, Big Brother reveals another secret room. While one housemate feels more isolated than ever, there’s an advantage so big it’ll push everyone to their limits.
第 11 集 Episode 11
播出时间：2021年5月13日
Keep your friends close and your enemies closer is the name of the game for one determined housemate. A monumental blindside unfolds when they finally get their shot at revenge.
第 12 集 Episode 12
播出时间：2021年5月18日
The housemates are about to get the shock of their lives as six incredible intruders prepare to turn the game upside down.
第 13 集 Episode 13
播出时间：2021年5月19日
Big Brother’s panic room takes two new victims and which two intruders will rise to the challenge and join the game for good.
第 14 集 Episode 14
播出时间：2021年5月20日
The housemates are tasked with mission impossible; a pumped-up challenge leaves someone feeling deflated; two housemates get close and an eviction ceremony shock.
第 15 集 Episode 15
播出时间：2021年5月25日
Housemates have to keep their cool in Big Brother’s most nail-biting challenge yet. Could a budding romance be the kiss of death? And Sonia reveals another big twist! Hosted by Sonia Kruger.
第 16 集 Episode 16
播出时间：2021年5月26日
While the walking dead housemate gets ready for battle, a new force is on the rise. Will they be strong enough to make their target the next walking dead? Hosted by Sonia Kruger.
第 17 集 Episode 17
播出时间：2021年5月27日
Big Brother flies in some special guests for a task that has everyone in a flap. Which massive player won’t survive the walking dead eviction showdown.
第 18 集 Episode 18
播出时间：2021年6月1日
Big Brother unleashes the devil within, pushing housemates to the limit - mentally, physically and emotionally - in the most brutal challenges yet. This is hell week.
第 19 集 Episode 19
播出时间：2021年6月2日
Big Brother adds fuel to the fire of Hell Week with a spectacular twist that will send home a major player.
第 20 集 Episode 20
播出时间：2021年6月3日
Hell Week reaches it's dramatic conclusion with the most terrifying challenge in Big Brother history. Then an almighty bombshell blows the game up.
第 21 集 Episode 21
播出时间：2021年6月8日
The new heads of house embrace their role, joining forces to create havoc. Meanwhile past alliances are thown out the window.
第 22 集 Episode 22
播出时间：2021年6月9日
As the heads of house enjoy the perks and power of being 2IC, Big Brother goes into overdrive, revving up the rest of the housemates. Can one housemate talk their way back into a circle of trust.
第 23 集 Episode 23
播出时间：2021年6月10日
With just eight housemates remaining, paranoia is high and huge deals are being made. What massive game changer lies with Big Brother’s secret eye?
第 24 集 Episode 24
播出时间：2021年6月15日
With the end game getting closer, get ready for the biggest move the game has seen as the shimmering jewel in Big Brother’s crown is revealed.
第 25 集 Episode 25
播出时间：2021年6月16日
As housemates deal with the ramifications of the last eviction, someone awaits a roommate in the mirrored room – but will they go crazy first?
第 26 集 Episode 26
播出时间：2021年6月17日
A massive challenge with a massive reward will push housemates to their limits but the biggest surprise is yet to come when the mirrored room is revealed.
第 27 集 Episode 27
播出时间：2021年6月22日
The end is in sight and it’s do or die for the final seven housemates. They’ll push themselves to breaking point through the toughest challenges yet in a bid to save themselves from eviction.
第 28 集 Episode 28
播出时间：2021年6月23日
Paranoia is setting in for the top six housemates as they fight for their lives in Second Chance Week.
第 29 集 Episode 29
播出时间：2021年6月24日
After months of challenges and evictions, only five housemates stand and everyone has their sights set on podium. All that lies between them and the final four are two epic nomination challenges.
第 30 集 Episode 30
播出时间：2021年6月29日
Big Brother’s heartstopping end game is here as the final four battle it out. Who will make it to the final three ahead of the epic live grand finale?
第 31 集 Episode 31
播出时间：2021年6月30日
All the housemates are reunited as host Sonia Kruger grills the final three on why they deserve Australia’s vote, before the winner of the ultimate reality television title and $250,000 is announced.
第 32 集 Episode 32
播出时间：2021年7月1日
