Following a recent eviction night, “Pinoy Big Brother Celebrity Collab Edition” has introduced a major twist: 10 evicted housemates have returned as “Duo Challengers.” Their mission is to secretly observe and test the remaining five duos, who are now vying for the first spot in the coveted Big Four.

In Tuesday’s episode, these ten former housemates re-entered the iconic “Bahay ni Kuya” (Big Brother House) and settled into a secret headquarters. From there, they are tasked with covertly watching the current five duos to understand their true dynamics and feelings when they believe no one is watching. The challengers will also face the duos in various tests.

At the end of their stint, the Duo Challengers will cast their votes for one duo they believe most deserves a spot in the Big Four. The remaining five duos will also get to vote for each other. The combined results from both groups will determine which duo secures the first Big Four spot. In case of a tie, a special challenge will decide the winner.

The five duos still in the competition are:

RaWi (Ralph De Leon and Will Ashley)

AzVer (AZ Martinez and River Joseph)

BreKa (Brent Manalo and Mika Salamanca)

CharEs (Charlie Fleming and Esnyr)

DusBi (Dustin Yu and Bianca De Vera)