CBS

Season 1: Episode 8 - The Long Fuse

The Long Fuse: Sherlock helps the NYPD investigate the bombing of a small web design firm that led to a pair of deaths. After combing through the debris, he makes an interesting discovery--the bomb was planted in 2008. With that knowledge, Sherlock attempts to solve a crime that had been lying dormant for almost four years. In the meantime, Watson reminds him that their time together is almost up and he needs to finally pick a sponsor.