Here's the rest of the story. Howard Fast may have written the novel "Spartacus," but Dalton Trumbo wrote the screenplay. And while Fast may have been a well-known radical, Trumbo had been blackballed from the picture industry and imprisoned for his communist tendencies. Kirk Douglas, who produced the movie, insisted on having Trumbo write it under his real name, as opposed to a pseudonym. And that's...[wait for it] the rest of the story.