Host Sharon Tharp breaks down week 1 of Big Brother 25 as Reilly wins the first Head of Household competition and starts to form a big alliance structure around her. Survivor legend Cirie Fields navigates playing with son Jared and building their own counter-alliance, as paranoia runs rampant after the veto competition thanks to her rather chaotic but loyal ally Izzy. Cory deals with distrust and suspicion surrounding him while Felicia quickly becomes a fan favorite. Sharon also talks about attending the BB25 premiere party in New York City.