David Bianculli

This season's new trend in boxed sets of television series on DVD is something that ought to be called the "megaset." These aren't just single-season collections of TV shows. They are compilations of every episode in a series.

Three new prime-time TV series premiere this week: scripted dramas on ABC and CBS, and a new quiz show on ABC. This week also brings the season finale of ABC's Dancing with the Stars, and lots of other activity involving first-run weekly television shows. Our TV critic says that all this action is related -- and little of it is cause for celebration.

Helen Mirren introduced the character of British police inspector Jane Tennison in the first Prime Suspect miniseries, imported by PBS 14 years ago. This weekend and next, the PBS anthology series Masterpiece Theatre presents the last entry: Prime Suspect: The Final Act.