WEEDS
Showtime, 10:00 p.m. ET
SERIES FINALE: I agree with those critics who suggest that this series has gone on for a few seasons too long — but for providing a weekly showcase for the sparkling, estimable talents of Mary-Louise Parker (as well as the already transplanted and less adeptly used Justin Kirk, on NBC’s Animal Practice), I’ll keep watching to the end. Which is tonight, in an expanded one-hour finale that returns Parker’s Nancy to the suburbs from which she came.