This document provides guidance on researching for a documentary production. It discusses researching information online and through organizations, newspapers, and speaking to people directly. It also discusses finding and selecting expert contributors, assessing their credibility and interests. Additionally, it addresses researching archive footage rights and costs, scouting suitable filming locations, and writing briefing documents. Finally, it discusses on-location responsibilities like catering to presenters and ensuring smooth filming, as well as post-production tasks like archive clearance and thank you letters.