|On January 4, 2015, I will be shutting down the server that hosts The TV IV website. It has been a very long time since I've been able to put any decent amount of time into the site, and ad revenue is plummeting. I think it is time to shut it down or hand it off to someone who can keep it going properly. If you are interested in taking over the site's code and data, contact administrators at tviv.org. --CygnusTMtalk|
| This article about a character needs to be expanded with more information.|
Please help out by editing it.
David Sinclair is a young FBI agent originally from the Bronx, NY. By season three, Agent Sinclair has worked under Eppes for longer than the other agents.
In the pilot Don was skeptical of Sinclair, because he thought Sinclair was put on his team to spy on him to the Director who questioned using math to solve crime. However, over time Sinclair has proved his worth to Eppes.