TV on DVD remains very popular with more and more favorites being released. New TV reviews include: Agatha Christie's Poirot: Series 4 - three excellent adaptations of the world's best-selling author and her famous sleuth; Adam-12: The Final Season - Reed and Malloy on their last patrol... powerful moments still manage to manifest themselves in the show with more episodes working than not; and Car 54, Where Are You? - The Complete Second Season - the sublimely silly sitcom returns for 30 more episodes. Other shows recently reviewed include:  Doctor Who: The Happiness Patrol, Borgia: Faith and Fear - Season One, and King Arthur and Medieval Britain.  Want more?  Check out all of the TV on DVD reviews in the DVDTalk database.