Nielsen ratings No. Title Release date Same day viewership Three day viewership Refs Persons 2+ rating Persons 2+ (AMA[lower-alpha 1] in millions) Persons 2+ rating Persons 2+ (AMA[lower-alpha 1] in millions) 1 "Chapter One: Suzie, Do You Copy" July 4, 2019 (2019-07-04) 2.9 8.86 6.3 19.16 [88] 2 "Chapter Two: The Mall Rats" 2.2 6.75 5.8 17.61 3 "Chapter Three: The Case of the Missing Lifeguard" 1.6 5.03 5.2 15.92 4 "Chapter Four: The Sauna Test" 1.2 3.63 4.6 13.93 5 "Chapter Five: The Flayed" 0.9 2.72 3.9 12.01 6 "Chapter Six: E Pluribus Unum" 0.7 2.11 3.5 10.77 7 "Chapter Seven: The Bite" 0.4 1.18 2.4 7.35 8 "Chapter Eight: The Battle of Starcourt" 0.4 1.13 2.9 8.70