CBS won a close three-way battle for the top spot in Tuesday night’s broadcast ratings as one NBC series fell to a season low and another set an all-time low mark, based on Nielsen overnights for the key 18-49 demo.

TVbytheNumbers.com reports that CBS came out just ahead of NBC and ABC, which tied for second place. NBC’s "Chicago Fire" lost three-tenths of a ratings point from last week to settle for a 1.9 average in viewers 18-49, the drama series’ season low.

NBC’s one-hour "The Voice" was the top show on broadcast Tuesday night with a 3.1 average in 18-49, but that number represents a new low for a fall Tuesday installment of the singing competition. Meanwhile, "The Biggest Loser" matched the 1.8 turned in by last week’s show.

CBS had consistent performances from its drama lineup. "NCIS" and "Person of Interest" equaled last week’s numbers in the 18-49 demo — a 3.0 for "NCIS" and a 2.0 for "Person of Interest" — while "NCIS: Los Angeles" ticked up one-tenth to a 2.5.

ABC got its best number out of its special "David Blaine: Real or Magic," with the 90-minute program delivering a 2.5 average in viewers 18-49. "Marvel’s Agents of S.H.I.E.L.D." inched up one-tenth from last week’s all-time low to a 2.3, while "The Goldbergs" drifted down one-tenth to a 1.6.

Fox’s Tuesday comedy lineup remained mostly at or near historic lows. "Dads" ticked up one-tenth from last week’s series low to a 1.3; "Brooklyn Nine-Nine" also gained one-tenth from last week’s series low, to a 1.5; "New Girl" equaled last week’s series low, a 1.7; and "The Mindy Project" dipped two-tenths to a season-low 1.2.

When the dust settled, CBS had a winning 2.5 average in adults 18-49 for prime time overall, ahead of NBC and ABC (both at 2.3), Univision (1.5) and Fox (1.4). CBS was comfortably ahead in total viewers with 15.5 million, topping NBC (8.3 million), ABC (6.9 million), Univision (3.7 million) and Fox (3.1 million).