CBS Announces Summer 2022 Premieres CBS’ reality competition shows are cranking up the heat with the back-to-back summer premieres of BIG BROTHER and THE CHALLENGE: USA, on Wednesday, July 6. BIG BROTHER opens the night with a 90-minute episode (8:00-9:30 PM, ET/PT), followed by the 90-minute premiere of one of the world’s most popular competition series, THE CHALLENGE: USA (9:30-11:00 …