NBC will premiere “The Traitors: New Blood,” a new version of its Emmy-winning competition franchise that marks the first U.S. season built entirely around everyday contestants, on Sept. 17. “The Traitors” has become one of Peacock’s biggest unscripted successes, earning multiple Emmy Awards, including honors for outstanding reality competition program and for Cumming’s hosting work. All previous seasons of “The Traitors” remain available on Peacock, while NBC plans to air “The Traitors: New Blood” on Thursday nights as part of its fall lineup.