Sherlock Holmes stands as the most iconic detective in the realm of fiction. The documentary “How Sherlock Changed the World” explores how Conan Doyle’s creation not only transformed literary detective stories but also had a profound impact on real-world investigative methods, often in ways that are not widely recognized. Holmes was portrayed as a scientist who employed techniques such as chemistry, fingerprint analysis, and bloodstain examination to solve crimes, at a time when convictions relied heavily on eyewitness testimony and direct evidence, and when police inefficiency allowed criminals like Jack the Ripper to roam unchecked. In essence, today’s detectives owe much to the innovative brilliance of Conan Doyle’s character.