(ABC/Christopher Willard)

Tuesday, April 20, 2021 ratings — New episodes: Supergirl, Pooch Perfect, Black-ish, Mixed-ish, Big Sky, The Resident, Prodigal Son, Kenan, Young Rock, and New Amsterdam.  Specials: The Chauvin Verdict. Reruns: The Flash, NCIS, FBI, and This Is Us.

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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?