The season finale of Kourtney & Khloe Take Miami was E!'s most-watched first season series concluder in over seven years.
The series, quadrupling the network's primetime delivery, averaged 2.6 million total viewers on Oct. 4, according to Nielsen.
The Kourtney & Khloe finale ranked as the No.1 show in its 10 p.m. time slot against all other ad-supported cable networks across all key measures, including adults, women and men ages 18 to 34 and 18 to 49, according to network officials.
The series averaged nearly 2.1 million total viewers in its premiere airings.
Meanwhile, the first season finale of Realiy Hell on Oct. 4 at 10:30 p.m. averaged nearly 1 million total Viewers, nearly doubling E!'s primetime delivery and attracting 65% more viewers than the year-ago time period.
Across its eight-episode run, Reality Hell averaged over 900,000 viewers, out-performing E!'s primetime average by 60%.