While MLB has yet to officially announce the start times for the games of the 2010 NLCS, you can probably count on Game 1 getting underway at 7:30 P.M. ET (sorry: spoiler alert!).
According to the banner on FoxSports.com, Game 1 between the San Francisco Giants and Philadelphia Phillies -- and Tim Lincecum and Roy Halladay -- is set for a 7:30 P.M. ET start time (screenshot'd so it never ever goes away):