Season 27 of Big Brother premiered last night, and though we're only in the early stages of the season, it's clear that Hotel Mystère is going to be packed with mystery and intrigue. The episode began with this season's houseguests further introducing themselves,

"Big Brother" Season 27 contestants better grab a life vest, because star Rachel Reilly is checking in as the 17th houseguest

A former 'Big Brother' player – and winner – was unveiled as the mystery 17th houseguest during the season 27 premiere.

The cast of "Big Brother" Season 27 has been revealed — with one "Mystery Player" set to make a surprise entrance.

The new season of the hit reality competition series "Big Brother" includes new elements including the introduction of a mysterious masked visitor with a secret accomplice and an unknown houseguest to be revealed sometime during the season.

Not even The Masked Singer fandom is that good at figuring out identities that quickly, so props to the Big Brother fans who figured all of this out with so little information in less than a day. CBS may want to uses masks next time.