Numb3rs. The Third Season

FBI Special Agent Don Eppes recruits his mathematically gifted brother, Charlie, to help the Bureau solve a wide range of challenging crimes in Los Angeles. Don is assisted by fellow agents Megan Reeves, David Sinclair, and Colby Granger, while Charlie finds insight and encouragement from a co-worker, Dr. Larry Fleinhardt, and Amita Ramnjuan, Charlie's former grad student.