NCIS: Los Angeles Season 4 Episode 7 (11/20/12)
A man was murdered and had a microscopic surveillance device cut out of his body and stolen. NCIS has to find the device before it gets sold to an enemy. They get a lead when a video of the murder shows up online. NCIS tracks the owner of the video to the surf world. The surfer tries to blackmail the murderer into paying for the full video and one of them is killed. From the full video, NCIS is able to track the killer and retrieve the device.