Obsession is the third episode of the second season, and the sixteenth episode overall. It was released on October 7, 2005.
Singer and superstar Skyler Wyatt reports a knife-wielding intruder in her home. The break-in seems to be connected to the hate mail she has been receiving for the last three months. Don begins to investigate and the body of a paparazzo is discovered in an area overlooking Skyler's home. Don brings in Charlie to analyze the hand-written hate mail and to try to determine where the strange photographs found on the dead body were taken. As the investigation proceeds the brothers are drawn further into the murky world of the paparazzi and celebrity stalking!
Beyond the literal, there is also a sense of celebrity perfumes, like Calvin Klein's Obsession, and similar 'development of the brand'.
Larry's "new" car is a 1931 Ford Model A Deluxe Roadster.
Navi Rawat and Samaire Armstrong both starred on The O.C. (2003).
When Larry and Charlie are talking in Charlie's office and David comes in to ask about the photo location analysis, when David walks into the office, the shadow of the boom mic is visible in the upper right-hand corner of the screen.
When Larry is showing Amita and Charlie his "new" car, his reserved parking sign reads "Cal Sci Mathematics." Dr. Fleinhardt is a physicist, not a mathematician. Even though Math and Physics are usually part of the same division at a university, they are still separate departments.
[This appears on the beginning of the episode] 1,000,000 Women Stalked 170K Celebrities 4400 Murdered 1 Obsession