By James Hibberd
July 02, 2013 at 05:36 PM EDT

Under the Dome did a good job of keeping the lid on most of its viewership for its second episode on Monday night.

The CBS thriller had 11.5 million viewers and a 2.8 rating, down only 15 percent from last week’s record-setting premiere and easily winning the night.

Meanwhile, the return of NBC’s American Ninja Warrior lost its grip (4.9 million, 1.7), the two-hour premiere slipped 29 percent from last summer’s opener. ABC’s The Bachelorette (6.2 million, 2.0) topped Ninja to win the 8 to 10 p.m. slot.