Tonight on NBC, GREAT NEWS from Tina Fey, Robert Carlock, and Tracey Wigfield (who created the show) premieres at 9/8c with back to back episodes.   Briga Heelan is Katie Wendelson, a news producer struggling to make an impression on her uptight boss (Adam Campbell); Andrea Martin is her mom, Carol. No longer content to sit at home, Carol gets a job as an intern at the station and immediately throws Katie’s life into turmoil. The duo has great chemistry