The detective series "Numb3rs" tells the story of FBI agent Don Epps and his genius brother, Charles. Charles has the ability to store vast numbers in his mind and calculate possible scenarios using mathematics. In each episode, Don and his partners take on the investigation of another crime on the streets of Los Angeles. In the most complex cases, they are aided by Charlie. With the help of unique diagrams and mathematical analysis, Charlie flawlessly identifies the criminal, even when professional police officers give up.