It hasn’t been a very good season for new unscripted skeins, but NBC’s “The Biggest Loser” quietly wrapped its run with hefty numbers Tuesday.

Another edition is already in the works for “Loser,” a weight-loss contest hosted by Caroline Rhea that delivered the Peacock’s best regular programming numbers in its timeslot in nearly four years.

According to Nielsen, “Biggest Loser” busted its seams with a slot win from 8 to 9:30 in adults 18-49 (5.9 rating/15 share) and drew 13.71 million viewers overall — both series highs.

A reunion seg of “Loser” is planned for 8 o’clock next week, with NBC eventually turning the slot over this spring to unscripted boxing series “The Contender.” Fox’s “American Idol” invades the hour when its fourth edition bows next week.

Fox’s unscripted Richard Branson-topped dud “Rebel Billionaire” wrapped with a two-hour finale Tuesday that placed fourth for the night (1.6/4 in 18-49, 3.70m).

CBS fared better with “The Amazing Race 6” (4.3/10 in 18-49, 11.07m), which moved ahead in demos at 9:30 over the second Tuesday outing for NBC comedy “Committed” (4.4/11 in 18-49, 9.94m).

Next week could be key for both “Committed” and its new regular lead-in, “Scrubs,” which returns after a two-week break. NBC could really use a hit comedy, and the opening returns for “Committed” have been solid.

At 10, NBC clinched a nightly victory with the second-best scores ever for “Law & Order: SVU” (6.5/17 in 18-49, 15.95m).