DESCRIPTION: (from NBC's press release, September 2018) NBC's longest-running primetime series, Dateline NBC, begins its 27th season on Friday, September 28, with an all-new broadcast at 10 p.m. ET/9 p.m. CT. Leading up to the series premiere, Oxygen will run an all-day Dateline: Secrets Uncovered marathon. The series recently won across the board for the second consecutive season, delivering its biggest advantages over ABC's 20/20 among total viewers, A25-54 and A18-49 in 15 years. Finishing its 25th season on Fridays, Dateline continues to reign as the dominant Friday newsmagazine for five out of the last six seasons. For the third quarter period, Dateline was also #1 across the board for the 6th consecutive quarter and in eight of the last nine quarters, topping 20/20 by double-digits across all key demos.