NBC’s Jan. 7 “Rockford Files” launch leads a lineup including “The Traitors: New Blood,” “Law & Order: SVU” and the flagship “Law & Order.” NBC is developing a female-led “66th North Precinct,” rebooting live musicals and preparing Doc Rivers for its first NBA coverage since 2002. Watch the procedural’s casting, Traitors’ 41–42-minute format and Peacock’s “The Voice” simulcast.