In Friday's opening episode last week, Big Brother revealed a so-called 'Bank of Big Brother', involving a brand new Big Brother currency 'Big Coin'. The new currency will play a "very important" role throughout the new season.
Big Brother told the housemates that they would have the chances to acquire Big Coins through tasks, twists and challenges. Big Coins can buy privileges, luxuries, and experiences and also change the fate of the game.
Revealing the first twist, Big Brother announced to the group that there would be no nominations this week and instead the three housemates with the fewest Big Coins will face eviction automatically.
As part of the Big Coin twist, Zoe Jones has been given an extra advantage after she chose to sleep in bed 13 on launch night.
In Sunday's first highlights show, Zoe was called to the Diary Room for a chat with Big Brother.
"Last night, you chose to sleep in bed number 13. By sleeping in bed 13 you've earned yourself a special power," Big Brother teased.
"Well, tell me more!" enthused Zoe.
Big Brother continued: "In a few days' time, you will have the power to swap Big Coin totals with any of your other housemates. If you use the power you'll be given their Big Coins and they will be given yours."
Big Brother then gave Zoe a necklace as a "symbol of your power".
"This special power is a secret," Big Brother said, "And you should keep this necklace hidden from your fellow housemates. Whether or not you use this power and who you decide to swap with, will be up to you."
"I'm right happy now. I've been feeling a bit sad so thanks for that," Zoe told Big Brother.
She then got emotional: "I just miss my boy. It's just strange, 'cause I'm with him all the time. I don't feel like I'm bonding with anyone. All the girls are together and they're doing girly stuff and I'm not like that."
Zoe then quipped: "I'm going to put my necklace in my bra. I don't think anyone's going to go down there."
Tonight saw Zoe make her decision after revealing her secret power to the group. She chose to use her power to swap coin totals with Lewis G.
The move did not change the outcome of the task. The housemates with the fewest votes were Anamélia Silva, Sîan Hamshaw and Kay Lovelle and they are therefore the housemates up for eviction this week.
Big Brother 2018 continues Sunday-Fridays at 10PM on Channel 5.