One week after a sluggish premiere, NBC’s reality competition series “Stars Earn Stripes” took a tumble Monday while Fox’s “Hotel Hell” edged up in its second outing and teamed with “Hell’s Kitchen” to lift the net to victory on the night in key demos.

According to preliminary national estimates from Nielsen, Fox’s Gordon Ramsay series “Hotel Hell” (2.0/6 in 18-49, 5.2 million viewers overall) grew slightly in both demos and total viewers, standing as Monday’s No. 2 series in adults 18-49 — behind only lead-out “Hell’s Kitchen” (2.5/7 in 18-49, 6.2 million viewers overall), which was down a bit week to week. For the night, Fox led among the broadcasters in 18-49, 25-54 and total viewers.

At NBC, a repeat of “America’s Got Talent” (1.1/3 in 18-49, 4.7 million viewers overall) was followed by the second week of “Stars Earn Stripes” (1.1/3 in 18-49, 3.5 million viewers overall), which came down about 35% from its two-hour premiere of last week and placed fifth place among the broadcast networks in 18-49. Closing out the night was the season’s second episode of “Grimm” (1.6/5 in 18-49, 4.9 million viewers overall), which was down 20% from its season opener of last Monday but is still above average for what the show was doing on Friday last season. NBC is hoping the extra exposure on Mondays will bring viewers to Friday, where its original episodes will begin airing in mid-September.

CBS aired encores of “How I Met Your Mother” (1.2/4 in 18-49, 4.2 million viewers overall), “2 Broke Girls” at both 8:30 (1.4/4 in 18-49, 4.8 million viewers overall) and its new time period of 9 p.m. (1.6/4 in 18-49, 5.4 million viewers overall), “Mike & Molly” (1.5/4 in 18-49, 5.3 million viewers overall) and “Hawaii Five-0” (1.0/3 in 18-49, 5.0 million viewers overall).

Monday’s ratings for ABC’s “The Bachelor Pad” (1.5/4 in 18-49, 4.8 million viewers overall) and finale of “The Glass House” (0.9/3 in 18-49, 2.8 million viewers overall) are inflated due to preemptions on the local stations in Philadelphia and Boston for Monday’s NFL preseason game between the Eagles and Patriots.

Preliminary 18-49 averages for the night: Fox, 2.3/6; ABC, CBS and NBC, 1.3/4; Univision, 1.2/3; CW, 0.2/1.

In total viewers: Fox, 5.7 million; CBS, 5.0 million; NBC, 4.4 million; ABC, 4.1 million; Univision, 3.2 million; CW, 0.5 million.