"Dateline NBC is getting a third night per week beginning Dec. 26, when 8 p.m. Tuesdays becomes a regular slot for the NBC newsmagazine," TV Week reports. "Dateline has been airing on Saturdays and will return to Sundays after the NFL TV season is over, ending NBC's Sunday night football franchise."

Dateline is displacing "Friday Night Lights" on Tuesdays...