(ABC)

Friday, January 8, 2021 ratings — New episodes: Shark Tank, 20/20, Dateline NBC, Whose Line Is It Anyway?, Penn & Teller: Fool Us, MacGyver, Magnum PI, and Blue Bloods.  Sports: WWE Friday Night Smackdown.  Reruns: Mr. Mayor.

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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?