Just watched the movie Mank on Netflix. It is the story of the alcoholic script writer that wrote Citizen Cane. He also had the idea (and never got credit) for the change from B&W to color for the Oz movie. It is in B&W, witty and all about character. My wife says it was too talky for her (I was surprised), but I found it engaging. Lots of info on how movies were written back in the 1930's.