Susan Beaubian

The BAU investigates the cause of several fatal car crashes involving drivers and pedestrians. Also, Reid gets bad news.

When Reid fears his mother has been abducted, he asks the BAU to investigate while he's stuck in prison.

Don recruits Charlie to help figure out where a pair of serial bank robbers will strike next, but his accurate prediction fails to take into account the robbers' motives, and an agent is killed.

Don and his team must investigate the death of an independent computer researcher with a Defense Department contract, recruiting Charlie to decipher the victim's computer data.

Don uncovers a potential terrorist plot targeting the Los Angeles water supply.

When a mathematician (Neil Patrick Harris) gets close to solving the Riemann hypothesis, a difficult math problem whose solution is worth millions, his daughter is kidnapped.