“20/20″ was Friday night’s No. 1 show, drawing 8.3 million viewers, tying a season high. The show was up +20% vs. last year in viewers and up +5% in the A25-54 demo. “20/20″ also came in first in the news demo for the 10pm hour. Two hours earlier, on NBC, “Dateline” brought in 7.6 million viewers, its best performance since Jan. 3 and winning its 8pm time period in the A25-54 and A18-49 demos. “Dateline” Friday was up +24% in viewers week-to-week.