The combination of World Series and Halloween paved the way for most shows to turn in scary ratings.
NBC: This Is Us (8.3 million/2.0 rating) crashed seven tenths to a series low. Law & Order: True Crime (3.6 million/0.8 rating) was also affected, slipping three tenths.
The Voice (6.2 million/1.0 rating) aired a clip show rounding up what happened during the Battle Rounds.
The CW: The Flash (2 million/0.7 rating) and Legends of Tomorrow (1.4 million/0.4 rating) hit lows.
CBS: NCIS (11.9 million/1.2 rating), Bull (9.6 million/1.0 rating) and NCIS: New Orleans (8.8 million/0.9 rating) all slipped double digits.
ABC: The Middle (5 million/1.1 rating), Fresh off the Boat (3.5 million/0.9 rating), Blackish (3.6 million/1.0 rating) and The Mayor (2.4 million/0.7 rating) all fell, but Kevin (Probably) Saves the World (2.7 million/0.6 rating) was stable.
Fox: The World Series Game Six (18.9 million/5.1 rating) topped the night.
Paul Dailly is a staff writer for TV Fanatic. Follow him on Twitter.