NBC, Wednesday 9-10 The pace of this inside-the-White House series (from Adam Sorkin, who also created ABC's Sports Night) is so frenetic you may need a stiff drink before it's all over. This is Beltway humor that's definitely below the belt. Rob Lowe plays the craven Sam Seaborn, a deputy communications director who slept with a hooker--and he's just one of a troublesome staff. It's up to Martin Sheen--a kind of "President Knows Best"--to keep them in line. He's basically playing the same character Michael Douglas did in Sorkin's The American President, projecting earnest goodness and all that. It's a little hard to fathom in the Clinton era, but maybe this is a bridge to the next millennium. The show has potential and some good writing, but it'll take time to see if it can develop into anything more substantial. Also starring: John Spencer, Brad Whitford, Richard Schiff, Moira Kelly Wednesday September 15, 4:14 pm Eastern Time