Complete story — includes the ending
A young woman, Samantha Wabash, commits suicide by shooting herself on a bridge, tying her gun to a weight so it will drop into the river below afterward. She wants to frame a man named Lucas Bundsch as her killer. Samantha believes that Bundsch murdered her sister Allie six years before. Sherlock deduces that her death was a suicide. Bundsch is brought in anyway, but passes a polygraph test. However, Sherlock deduces that Bundsch fooled the test and concludes Bundsch was responsible for Allie's murder, as well as others. Bundsch abuses his victims for weeks before killing them. Bundsch goads Sherlock, humiliating him and Joan at one point with a wild goose chase. He texts Sherlock, using an untraceable burner phone, the address of the woman he has just taken. Sherlock finds from blueprints that when Bundsch's recording studio was built, the building lost square footage. The police find a hidden door. Sherlock picks the lock and frees the latest abductee and a woman Bundsch had held captive for years.
Sources and content license
Source and revision history · Adapted from Wikipedia contributors, List of Elementary episodes. HTML formatting and reference markers removed. · Content license