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Friday, September 17, 2021 ratings — New episodes: Big Brother, The Greatest #AtHome Videos, Dateline NBC, 20/20, Burden of Truth, and Dynasty.  Specials: Soul of a Nation: Corazón de América – Celebrating Hispanic Culture.   Sports: WWE Friday Night SmackDown.  Reruns: Blue Bloods and American Ninja Warrior.

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These are the fast affiliate ratings. The percentages represent the change since the previous original episode. (Percentages aren’t given for reruns or specials.) To see past ratings for a particular show, click the show’s link. The show pages are updated with the daily final ratings when they become available. Those pages include season averages to date.

What were you watching last night? Original network programming, reruns, cable, or something else?