Game 4 posted a 18.2 national rating giving the series an overall average of 15.8.
Game 2 on Sunday posted a 15.0 rating, up 19 percent from last year's 12.6.
The drama posted high ratings in China during its run.
The game posted a 6.9 overnight rating, up 53 percent from last year when it was played on a Saturday night.
Both shows posted strong ratings among 18-to-49-year-olds, and the two networks tied in that demographic for the night.
For the first four weeks, the season posted a 2.5 rating among people 12-34, a 14% increase from the prior season-to-date.
The New York market posted a 5.03 rating, or 349,000 households.
His number-retirement game posted a 7.0 overnight rating from 25 major markets.
Most reality shows start out with open-ended futures and receive orders for additional runs only after they post good ratings.
The series' premiere episode gained 300,000 total viewers and posted a 0.42 rating within the women 18-to-34 demographic.
