The Little Mermaid Live! Ratings Success
According to The Hollywood Reporter:
The ABC special, which first aired Nov. 5, put up solid gains with seven days of delayed viewing. It tied with The Walking Dead and American Horror Story for the ninth-largest boost among adults 18-49 in the week of Nov. 4-10, growing by 0.84 points from its initial 2.6 rating. The Little Mermaid Live! also added 2.7 million viewers over seven days, a little outside the top 20 for the week.
Both the viewer gain and the 18-49 boost are larger than usual for a "live" event (the special aired on tape delay outside the Eastern and Central time zones). Fox's Rent Live in January, for instance, gained only 0.2 in adults 18-49 and 729,000 viewers over seven days. Jesus Christ Superstar Live in Concert, which aired on NBC in April 2018, had similar initial ratings to The Little Mermaid Live! but didn't grow as much after the fact.
The special also held onto its spot as the week's top-rated entertainment program in adults 18-49: Its 3.44 rating after seven days is 0.41 better than the 3.03 for The Masked Singer. As usual, This Is Us (+1.43 in adults 18-49) and The Good Doctor (+5.05 million viewers) had the biggest total gains. Half of the top 20 at least doubled their same-day 18-49 ratings over a week.