Can "Law & Order" outlive "Gunsmoke"?

NEW YORK — "POPPA DON'T TAKE NO MESS!"

The outburst comes from Anthony Anderson, who is describing the essential qualities of Kevin Bernard, the latest detective to join NBC-TV's long-running "Law & Order." The fun-loving and funny Anderson debuted last season as Bernard and resumes busting bad guys at 10 tonight with the season opener.

If Anderson has an off-camera "off switch," it's nowhere to be found this day as he shoots scenes inside Silver Screen Studios at Chelsea Piers, which houses the crime drama's precinct, district attorney's office, courthouse, prison and morgue. He bellows throughout the day, at one point jokingly scolding a crew member, "GET OFF THE TELEPHONE, WOMAN!"

Cast changes

Anderson's outsized personality doubtless proved a draw for show creator Dick Wolf, who cast him as Detective Cyrus Lupo's (Jeremy Sisto) partner. Wolf handpicks each police detective and prosecutor on "Law & Order," and deemed Anderson a "natural" successor to Detective Ed Green (Jesse L. Martin), citing his comic timing, screen presence and acting chops.

Another factor? Youth.

Anderson, 38, follows Sisto, 34, and Linus Roache, 44, as the third in a swift succession of young actors — well, young by "Law & Order" standards — recruited by Wolf for the 18th season, which concluded in May. The venerable series is a recent victim of near-cancellation, and fresh blood could be just the bait needed to lure the younger viewers that advertisers love and keep the show going for another two decades.

The new season has S. Epatha Merkerson (Lieutenant Anita Van Buren) remaining on duty, overseeing Sisto and Anderson; Roache as Chief Assistant District Attorney Michael Cutter, who succeeded Jack McCoy (Sam Waterston), the newly promoted district attorney. And Alana De La Garza (Executive Assistant District Attorney Connie Rubirosa) resumes her role.

But it remains to be seen whether the cast reshuffling will achieve Wolf's greatest ambition: to surpass "Gunsmoke" as the longest-running prime-time drama in the history of television.

Wolf, 61, has long wanted to overtake the classic Western, which ran from 1955-1975 on CBS; tonight's season premiere will herald 19 years for "Law & Order."

But the TV mogul, who oversees the spinoffs "Law & Order: SVU" and "Law & Order: Criminal Intent," nearly lost his chance for the record when NBC threatened to cancel after a sharp ratings drop last season.

Any plug-pulling seems preposterous, given the series' enduring status as the mother ship of one of the strongest franchises on TV. Wolf struck a last-minute deal to save the show in May 2007 by trading "Criminal Intent" to the NBC-owned USA Network in exchange for another year of "Law & Order" on the Peacock Network.

As it happens, the original series fared well in its 18th season: It debuted in January amid the writers strike with fresh episodes and averaged a total 10.7 million viewers. That's a major jump, up 19 percent from the previous season (9 million average viewers), according to NBC ratings expert Tom Bierbaum.

It's also a positive sign for a show that peaked in its 2001-02 season with an average viewership of 18.7 million, and has steadily decreased in the ratings as TV began losing viewers to the Internet and other digital phenomena.

Waterston attributed the audience bump to the show's move to Wednesday from Friday, one of the least-watched nights on TV, and to Wolf's talents at keeping it fresh without tinkering too visibly with a tried-and-true format.

"He's a magician. ... He changed the look of the show, he changed the way it's lit, he changed the way it's shot and the way it's edited, but not so that you go, 'Oh this is not the same show.' But it's all refreshed," said the 67-year-old actor, citing the increased practice of shooting scenes from different angles and lighting scenarios to provide more options in the editing room.

Dipping into the fountain of youthful actors could help Wolf achieve his goal.

Keeping with formula

If "Law & Order" has a weakness, it's that its core audience — boomers who value a good whodunit — skews outside the target 18-49 demographic coveted by advertisers, said TV historian Tim Brooks, who compared the show to nonglitzy, well-written mysteries such as "Matlock" and "Murder, She Wrote" — and "a comfortable old shoe."

That's not a bad thing, though. It provides stability for NBC, which continues to struggle in the ratings, and has also grown a following in syndication on cable; on any given night, viewers can find "Law & Order" on TNT, and "SVU" and "Criminal Intent" on the USA and Bravo networks.

Wolf said the reason "Law & Order" has remained on the air so long rests with its self-contained, plot-driven formula.

"You don't have to see it for a week, a month, a year," he said. "You come back into a totally complete hour of television with a beginning, middle and an end, and hopefully, a satisfying conclusion. And you can go on your merry way and, if you catch it two years later, it can be a completely different cast. But it still works as exactly the same."

Despite cast turnover, "Law & Order" has retained its tradition of using real-life headlines and twisting them into dramatic plot lines. Tonight's show delivers a thriller of messy elegance as the detectives and attorneys clash over McCoy's bold move to classify a bloody street fight as a terrorist attack.