Turner Classic Movies' Greatest Classic Films Collection: Romantic Comediescollects four movies on two double-sided discs,  with top picture quality and the bonus features that appeared on disc 1 when two of those films were released on two-disc sets, or the features that appeared on the single discs of the other two.  Here the spotlight is on Katharine Hepburn and her unmatched flair for screwball comedy.The Philadelphia Story(1940) costars Cary Grant and James Stewart, andBringing Up Baby(1938) costars Grant.  Each film has a commentary track, by film historian Jeanine Basinger and Peter Bogdanovich, respectively, and a trailer gallery of other movies by the respective directors (George Cukor and Howard Hawks).Adam's Rib(1949) andWoman of the Year(1942) pair Hepburn with her longtime partner Spencer Tracy, and each film is accompanied by its own trailer.--David Horiuchi