Boston Public: Carin Baer/FOX.
Dennis Miller
SHOW ''Boston Public'' (Fox, Fridays at 9 p.m.)
WHEN Oct. 31 (in his second of a five-episode arc)
AS A money-grubbing investment banker who, convicted of securities fraud, sidesteps jail by agreeing to teach math at an inner-city school
WHY WE CARE Dennis Miller (right, with Victor McCay) is to teaching as Colin Farrell is to babysitting. If executive producer David E. Kelley lets this guy ad-lib, the students won't know what hit them.
