This document discusses the preproduction process for creating a documentary. It covers researching topics, casting characters, writing a proposal, pitching the idea, and creating a treatment. The treatment breaks the documentary into sequences rather than scenes and outlines the major shots and story structure. It also provides guidance on writing character biographies, including sociological and psychological profiles, to help map out how the story will unfold. Developing the proposal and treatment is important for defining the story and organizing ideas in the early creative stages.