This document summarizes the target audiences, market research approaches, and common documentary codes and conventions for several documentary films. SpellBound targeted 10 year old to adult Americans interested in language. Night Mail aimed for the post-war demoralized British public. Planet Earth mostly targeted older audiences due to its subject matter, while Dynamo - Magician Impossible attempted to appeal to teenagers by featuring music stars. The documentaries employed a variety of codes like direct address, voice-over narration, interviews, and observational filming styles to engage their intended viewers.