“Grease: You’re the One That I Want” had a promising debut in January, thanks to its unique concept. It invited viewers to vote on who would win the starring roles on the Broadway revival of “Grease.”

But in the weeks since, the show took a major tumble. Last night at 8 p.m. the season finale averaged a 1.9 adults 18-49 rating, according to Nielsen overnights, even to the previous week and down 58 percent from a 4.3 for its premiere.

“Grease” actually looked like a solid show in the early going, but increased broadcast competition and a surprisingly dull group of contestants likely did it in.

“Grease” was flattened by football in late January and early February, as the buildup to the National Football League’s Super Bowl sapped any momentum for the show. ABC’s hit Sunday lineup and Fox’s solid comedies also likely hurt the show, as did CBS’s NCAA basketball the past two weeks, which kept viewers watching the network after the games ended.

The show did actually see a big boost in its second half hour, going from a 1.6 to a 2.3, but that only brought it even to last week’s rating.

CBS finished first among 18-49s on a slow Sunday night, averaging a 3.6 rating and a 10 share. Fox was second at 2.8/8, ABC third at 2.6/7, NBC fourth at 2.1/6, Univision fifth at 1.3/4 and CW sixth at 0.7/2.
 
Ratings for CBS are approximate as overnights measure timeslot data and not actual program data, and basketball bled over two timeslots.
 
At 7 p.m. CBS began the night in the lead with a 4.0 average for NCAA basketball runover and the start of “60Minutes.” ABC was second with a 2.3 for “America’s Funniest Home Videos,” Fox third with a 1.4 for an hour of “The War at Home” and NBC fourth with a 1.2 for “Dateline.” Univision was fifth that hour with a 0.9 for “Hora Pico” and CW sixth with a 0.7 for a repeat of “Pussycat Dolls Present: Search for the Next Doll.”
 
ABC took the lead at 8 p.m. with a 4.2 for “Extreme Makeover: Home Edition,” followed by CBS with a 3.2 for “60 Minutes” and the beginning of “The Amazing Race.” Fox was third with a 3.1 average for ‘The Simpsons” (3.3) and “King of the Hill” (2.8), NBC fourth with a 1.9 for “Grease,” Univision fifth with the first of three hours of “Bailando por la Boda de Mis Suenos” and CW sixth with a 0.5 for a repeat of “7th Heaven.”
 
Fox took over at 9 p.m., leading with a 3.8 average for “Family Guy” (4.2) and “American Dad” (3.3). CBS was second with a 3.4 for the end of “Race” and the start of “Cold Case,” with NBC third with a 2.7 for a “Deal or No Deal” rerun, ABC fourth with a 2.2 for a repeat of “Desperate Housewives,” Univision fifth with a 1.5 for its second hour of “Bailando” and CW sixth with a 0.8 for a repeat of “America’s Next Top Model.”
 
At 10 p.m. CBS regained the lead with a 3.7 for the end of “Cold Case” and the beginning of “Without a Trace,” with NBC second with a 2.7 for “The Apprentice,” ABC third with a 1.7 for a repeat of “Brothers & Sisters” and Univision fourth with a 1.6 for the last hour of “Bailando.”
 
Among households, CBS led the night with an 8.2 average rating and a 14 share. ABC was second at 4.9/8, NBC third at 4.7/8, Fox fourth at 3.5/6, Univision fifth at 1.6/3 and CW sixth at 1.1/2.