BUSY SEASON FOR SHATNER

KEEP ON TREK-IN':

Two weeks ago I scooped the world with news that "Star Trek" icon William Shatner has a recurring guest role on the new UPN show "Enterprise." Now here's scoop-de-TWO: Shatner's nailed down a mid-season role on "The West Wing," playing a (Surprise!) captain in the U.S. military who butts heads with "President" Martin Sheen.