New shows spur prod'n upswing.(TV shows produced in New York)(Brief Article)

HOLLYWOOD Among the shows taking part in the resurgence of primetime television production in New York, "Third Watch" does the most on-location action shoots. The realism of the show, about fire and police squads, prompted enough New Yorkers to call 911 that producers now fly a 20-foot banner above their make-believe mayhem that reads, "It's Just a Movie."

"We have to be responsible and considerate," says Brooke Kennedy, the show's co-executive producer. "The city must continue."

There doesn't seem much that can stop New York these days as the city basks in an ongoing renaissance. Not even a dropoff in feature film production can dampen its glow, thanks to the sudden explosion of …