EXCLUSIVE: Tonight marks a significant first for Bunim/Murray Productions: its long-running hit The Challenge, which launched 25 years ago on MTV, will debut for the first time on broadcast TV. CBS will follow its summer hit Big Brother with the debut of The Challenge: USA, a spinoff from B/M and MTV Entertainment Studios that features players from CBS’ unscripted lineup of BB, Survivor, Love Island and The Amazing Race. (For an exclusive first look of the series, watch the video above).