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Thursday, April 18, 2019 ratings — New episodes: The Big Bang Theory, Life in Pieces, Mom, SWAT, Superstore, AP Bio, Brooklyn Nine-Nine, Abby’s, The Orville, Supernatural, In the Dark, Grey’s Anatomy, Station 19, and For the People. Reruns: Law & Order: SVU.

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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?