house to globetrotting on Amazing Race CBS has apparently taken the inspiration to consider expanding that adventure. This feature is not available right now. Celebrity Big Brother giving us quite an exciting year of BB fun. Big Brother 20 starts June 27th on CBS. CBS is getting us ready for the start of Big Brother 20 with its new promo for this summers season as they remind us of all the recent craziness and the promise of whats ahead. Big Brother 20 starts on June 27th 2018 for CBS following the debut season. Rating is available when the video has been rented. Cameron Heard, mark Jansen, megan Lowder, josh Martinez.