New episodes of Conan O’Brien’s The Tonight Show might be dominating the advertiser-coveted youth demographics, but they still can’t beat overall viewership numbers for repeats of David Letterman’s The Late Show, according to the New York Times. The margin is small — Letterman averaged just 7,000 more viewers than O’Brien — but the news is interesting because Letterman was airing repeats, while O’Brien was debuting new episodes. Such a feat has not been accomplished in more than 14 years. The good news for O’Brien, however, is that the kiddos love him. He only upped his dominance among younger viewers, beating Letterman by 62 percent in the 18-49 demographic. O’Brien’s median audience age is 46.8, which seems rather youthful compared to Letterman’s median audience age of 57.

St. Elmo’s Fire — the iconic ’80s Brat Pack flick which starred Emilio Estevez, Rob Lowe, Andrew McCarthy, Demi Moore, Judd Nelson, Ally Sheedy, and Mare Winningham — may be coming to ABC as an hour-long dramedy series, according to the Hollywood Reporter. Supposedly, several networks showed strong interest in the potential potential project, but ABC won the bidding war and now has a deal to produce a pilot. Joel Schumacher, who directed the film, has signed on as a producer, along with Topher Grace, Dan Bucatinsky, and Jamie Tarses.

The film starred the above actors as friends who’d just graduated from Georgetown University and chronicled their adjustment to adulthood. Apparently, this new series will use that concept as a jumping off point and introduce six new friends, three guys and three gals. The Georgetown setting and St. Elmo’s Bar & Restaurant (to be renamed St. Elmo’s Bar & Grill) will remain. If the set-up sounds like Friends‘ Central-Perk-with-three-guys-and-three-girls premise, the producers are fine with that. “I feel it is time to re-create Friends in the hourlong genre and feel like this is the perfect opportunity,” Bucatinsky told the Hollywood Reporter.

Saving Grace, TNT’s cop drama starring Oscar winner Holly Hunter, will end its run next summer with a nine-episode final season, the cable network confirmed in a press release sent out this morning. The show’s current summer run ends Aug. 18. According to the Hollywood Reporter, TNT actually wanted a full order (which means 15 episodes, split between summer and winter) for the fourth season, but the studio declined to accept the offer for financial reasons and instead struck this shortened deal to give Grace a proper send-off.

The cable series, which served as a natural companion to the network’s The Closer, has averaged 3.5 million viewers for the episodes that have aired this summer. Just last month, Hunter was nominated for an Emmy for her role as Det. Grace Hanadarko for the second consecutive time. The 2009 Emmy Awards will air live Sept. 20 on CBS.

Comedy Central has pulled the plug on Reno 911!. Star/co-creator Thomas Lennon broke the news that the show’s recently wrapped sixth season will be its last on his Twitter feed saying, “Reno 911! was canceled at 1:30 pm today. Won’t be wearing the shorts again.” When contacted by EW on Friday, a rep for Comedy Central said, “We can officially confirm that we won’t be making any more new episodes.”