QUICK TAKES - Sept. 19, 2009

Leno update: The fourth edition of “The Jay Leno Show” attracted 8.5 million people Thursday night, second in the 10-11 p.m. slot (behind the 8.7 million for a rerun of CBS’ “The Mentalist”) but first among viewers aged 18 to 49, NBC said. His premiere Monday drew 18.4 million viewers.

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Cop talk: John Buntin, author of the recent book, “L.A. Noir: The Struggle for the Soul of America’s Most Seductive City,” will engage departing Los Angeles Police Dept. Chief William J. Bratton in conversation about crime fighting at 7:30 p.m. Monday at the Writers Guild Theater in Beverly Hills. Tickets are $20. For reservations: writersblocpresents.com