Speaking exclusively to PEOPLE ahead of the premiere of Big Brother 27, Chen Moonves, 55, reflects on the 25th anniversary of the reality competition series and shares who she'd want to replace her if the time ever came for her to say goodbye to the summertime staple.

Each week, Big Brother host Julie Chen Moonves will weigh in on the latest events inside the house. This week, she reacts to being abducted by the Mastermind, Rachel Reilly’s return as the mystery houseguest, playing for the first Head of Household win, and the Secret Accomplice twist.

Big Brother host Julie Chen Moonves had some time to kill during the show's season 27 premiere on Thursday, July 10. The action-packed opener kicked off on a shocking note with the introduction of a mysterious new character called "The Mastermind,