'Big Brother 27' Features a 'Mystery Houseguest' Who Is 'Very Polarizing': Details!

It’s time to expect the unexpected once again as Big Brother gets ready to premiere what appears to be a stellar 27th season on CBS!

This week, we found out that the theme of the season is “Big Brother: A Summer of Mystery,” and we got an inside look at the BB House all decked out to display the theme.

Along with house photos, CBS also teased that, this season, there will be a masked visitor, a secret accomplice, and a mystery houseguest.

Host Julie Chen Moonves teased all three in a new interview.