The housemates are getting dressed up in their martian space suites - similar to the one that Ryan "fitzy" Fitzgerald wore on Launch Night.
Big Brother marches the housemates out and gets them to stand in front of the chairs with their names on. There is a water balloon on each of the chairs. Big Brother reminds the housemates that there is to be no swearing as it is live television.
Dixie and Bianca are comparing their camel toes under their skirts - charming.
The first challenge is to sit on their balloons and burst them with their bottoms. The last person to burst it will not play in tonight's games. They all sit down and burst their balloons. They all complain at it being cold and now having wet bums. Big Brother then tells them that he was joking at that they will all play.
They enter the arena where they are told that tonight's prize is worth $20,000.
Before they start, Big Brother instructs a ninja to hand them each a towel so they can wipe "your anus".
The guys are up first and have to stay on a platform that is moving for as long as they can. The winner is the last one standing. After the guys, the girls will compete.
Saxon manages to stay on the tilting platform the longest, but only just.
When the girls have their turn, Brigitte is screaming like, well, a girl. She has some great facials as she strains to stay on the platform.
Alice takes it out.
For winning the challenge, Alice and Saxon get to be team captains. Alice picks Travis, Rebecca, Rory, Dixie, Bianca. Saxon picks Nobbi, Brigitte, Ben, David and Renee. Where is Rima?
The next challenge is a race down a course while having their ankles shackled together. The other team gets to try and stop them by using some obstacles being pulled backwards and forwards.
Alice's team did an appalling job at 2:30 while Saxon's team completed the challenge in 1:18. Alice's team is off to the losers bench.
The remaining players split into two teams of three.
The next round is a a time challenge. David, Ben and Renee will be aliens in the first round. They need to chase a predator and collect a dreadlock and place it on the filing cabinet (The X Files). Saxon, Brigitte and Nobbi will be the predator. The team that collects the dreadlocks the fastest will win in a game called "Alien vs Predator".
Renee, Ben and David collect their dreadlocks in 55 seconds. Nobbi, Saxon and Brigitte complete the challenge in 50 seconds.
The next challenge is to find a final player for the semi final. The eliminated players will get a chance to get back in the game by racing on "your anus". They need to wiggle backwards down a field on their bums. Alice takes it out and is back in the Friday Night Games.
Saxon and Alice are teamed up together while Nobbi and Brigitte will be competing together.
The challenge is for someone to hang off the bottom of a spaceship on a ladder while the the other pedals the spaceship down a suspended wire. Saxon somehow manages to break the spaceship during their turn.
Big Brother disqualifies Alice and Saxon because Saxon broke both the rules and Big Brother's spaceship. Therefore, by default, Nobbi and Brigitte are through to the final.
Competing together, Nobbie and Brigitte have 3 minutes to fill a bucket with slime without using their hands to carry it.
Brigitte collect 2.54kg. Nobbie collect 4.15kg giving him the win and $20,000.
Big Brother wishes David a happy birthday and tells him that there is a party awaiting in the house.
Big Brother tells the housemates to get out of their games costumes, dry off and head to the lounge. Nobbi still has to stay outside though.
Nobbi selects Saxon to enter the diary room to collect something. Everyone is nursing their wounds.
Nobbi's $20,000 is in Zimbabwean dollars. Based on their rate of inflation, it's decreasing in value every second. The current exchange rate is 20,000:1 and Big Brother encourages him to spend his winnings wisely.