Monday night's broadcast of "The Bachelorette," the first part of the series' season finale, drew an average 7.77 million viewers and scored a 2.3 rating in the key 18-49 demographic, according to preliminary numbers from Nielsen, up 21% from last week.
A ratings point equals about 1.3 million viewers.
ABC followed up the two-hour broadcast with "Mistresses," which also increased viewers and ratings.
ABC beat CBS for the night. ABC average viewership was 6.56 million, with a 18-49 rating of 2.
CBS's "Under the Dome" fell in ratings this week. It was still the most-watched and highest rated show of the night, with 11.1 million viewers and a rating of 2.7 in 18-49.
The show, which follows a small town trapped under a transparent dome, was down about 4% from its previous week rating, matching its low from the series.
At NBC, "American Ninja Warrior" and "Get Out Alive with Bear Grylls" fell from last week to season lows. "Siberia" fell 14% from its previous episode two weeks ago to its series low.
Fox was in all repeats Monday night.