Pauley Perrette and Sean Murray Pauley Perrette and Sean Murray

CBS topped Tuesday with another big NCIS showing, while NBC's sitcoms slid to new lows.

NCIS returned to 21.8 million viewers and a 3.7 in the adults 18-to-49 demographic, down two-tenths from its last new episode. NCIS: Los Angeles (17.2 million, 3.1) and Vegas (11.1 million, 1.9) were both up.

Photos: 16 bad guys we root for

A week after hitting series lows, Go On (3.8 million, 1.2) and The New Normal

(3.1 million, 1.1) dropped again, allowing a double dose of Happy Endings (2.9 million, 1.2) to tie Go On for the first time and beat The New Normal with its second episode (2.8 million, 1.3).ABC's The Taste (4.8 million, 1.6) dropped five-tenths from last week's premiere.On Fox, back-to-back episodes of Raising Hope averaged 3.6 million and a 1.6, while New Girl (4.6 million, 2.5) and The Mindy Project (3.1 million, 1.7) grew.

8 p.m.

CBS: NCIS 21.8 million viewers (3.7 demo rating)ABC: The Taste 4.8 million (1.6)Fox: Raising Hope 3.9 million (1.7); Raising Hope 3.4 million (1.5)NBC: Betty White's Off Their Rockers 5.2 million (1.4); Betty White's Off Their Rockers 5.3 million (1.5)CW: Hart of Dixie 1.3 million (0.5) 9 p.m.
NCIS: Los Angeles 17.2 million (3.1)ABC: Happy Endings 2.9 million (1.2); Happy Endings 2.8 million (1.3)Fox: New Girl 4.6 million (2.5); The Mindy Project 3.1 million (1.7)NBC: Go On 3.8 million (1.2); The New Normal 3.1 million (1.1)CW: Emily Owens, M.D. 1.3 million (0.4)10 p.m.
Vegas 11.1 million (1.9)ABC: Jimmy Kimmel Live! (R) 3.2 million (1.2)NBC: Dateline 5 million (1.3)