The marvel of Katharine Hepburn's enduring stardom is how secure it is now, two decades after her death and three after her last film performance – especially compared to her early years in Hollywood, when audiences were having a hard time figuring out if they liked her at all. From her first role in George Cukor's A Bill of Divorcement (1932), Hepburn's appeal with the moviegoing public had a one step forward, two steps back momentum. She'd go from a hit like Alice Adams (1935) to a string of flops like Sylvia Scarlett (1935), Mary of Scotland (1936) and Quality...