I saw the 2004 Roundabout production of TWENTIETH CENTURY with Alec Baldwin and Anne Heche, the original production of the musical, and the current revival of the musical. While I don't remember a whole lot about the nonmusical, I recall thinking that the musical followed the story quite closely. All the action took place on the train. The Primrose equivalent, played by Tom Aldredge, was named Matthew Clark. He was mild mannered and seemed harmless until the craziness with the stickers was revealed, very much the way Letitia Primrose is written. One of Jaffe's employees (the press agent, I think) was a woman named Ida Webb, played by Julie Halston. I enjoyed the play, but, of course, missed the music because I had seen and loved the musical first. It was very witty and fast paced, with high energy leading performances.