This document provides an introduction to an assignment on documentary films and suggests several interesting topics that could be explored. It then summarizes four documentaries that the author watched: "Playing God" which discusses advances in biological engineering; "China's Ghost Army" about the Terracotta Army; "World's Scariest Drug" profiling a dangerous drug known as "Devil's Breath"; and "Twilight of the Porn Stars" examining the decline of the porn industry. Conventions used across the documentaries included the use of presenters, interviews with experts, dramatizations, and music to set tone.