CBS ANNOUNCES ITS SUMMER REALITY PREMIERE SCHEDULE “Big Brother” Kicks Off Milestone 25 th Season with Special 90-Minute Premiere Wednesday, Aug. 2 New Series “Superfan” to Now Debut Wednesday, Aug. 9 “The Challenge: USA” Launches Its Second Season on CBS Thursday, Aug. 10, Airing Twice Per Week for First Three Weeks “Secret Celebrity Renovation” Returns …