According to Nielsen’s most current ratings through the end of week 16 of the 2019-2020 broadcast season (week ending 1/12/20), CBS has taken over the seasonal viewership lead with an average audience of 7.96 million viewers.
Current season-to-date viewership numbers are as follows
(Source: Nielsen Most Current Ratings through 1/12/20):
CBS – 7.96 million
NBC – 7.76 million
FOX – 7.01 million
ABC – 5.34 million