"21"^^ . . . . . "2009-05-01Z"^^ . . . . . "5"^^ . "Disturbed"@en . . . "\"Disturbed\" is the 21st episode of the fifth season of the American television show Numb3rs. In the episode written by series creators/executive producers Cheryl Heuton and Nicolas Falacci, skeptical Federal Bureau of Investigation (FBI) agents track an undetected serial killer while their math consultant copes with his brother's recent injury."@en . . . . . . . . . .