TV spinoffs: The best and worst since 1990

(CBS)
19 of 30

'NCIS'

Spinoff of: "JAG"

"JAG" was starting to age by the end of the 2002-03 season, but by introducing a show about a team of investigators who work for the Navy, CBS was able to keep its military-drama franchise going -- and then some. "NCIS" increased the size of its audience in all but one of its first seven seasons, a rare feat for any series.

-- Rick Porter, Zap2it