NBC finished in fifth place Monday night among the broadcast networks, as the summer ratings doldrums continued across the board during prime time on Labor Day — hitting the Peacock Network especially hard, according to Nielsen overnights.

TVbytheNumbers.com reports that the two-hour season finale of NBC’s summer reality entry “Stars Earn Stripes” managed only a 0.9 in the key 18-49 demo, the show’s worst number ever. The program was followed at 10 p.m. by “Grimm,” which fell to a season-low 1.4, down 13% from a 1.6 a week earlier.

With CBS airing all repeats, Fox was the top-rated broadcast net, behind a 1.8 average rating in 18-49 for “Hotel Hell” at 8 p.m. and a 1.7 for a second episode of the show at 9 p.m.

ABC managed a 1.4 average in the 18-49 demo for its two-hour “Bachelor Pad,” with a low-rated “Castle” repeat (0.6 average) following at 10 p.m.

For prime time overall, Fox averaged a 1.7 in 18-49 to lead the way, followed by Univision with a 1.4, CBS with a 1.3, and ABC and NBC both at 1.1. CBS won total viewers with 4.6 million, ahead of Fox’s 4.4 million, ABC’s 4.1 million, Univision’s 3.5 million and NBC’s 3.4 million.