<Tr> <Td> ← Previous "Pyramid" </Td> <Td> Next → "Restless" </Td> </Tr> <Tr> <Td_colspan="2"> NCIS (season 9) List of NCIS episodes </Td> </Tr> <P> "Nature of the Beast" is the first episode of the ninth season of the American police procedural drama NCIS, and the 187th episode overall . It originally aired on CBS in the United States on September 20, 2011 . The episode is written by Gary Glasberg and directed by Tony Wharmby, and was seen by 19.96 million viewers . </P> <P> In the episode, Special agent Tony DiNozzo is shot and unable to remember what it all was about . He must work together with Special agent Leroy Jethro Gibbs and Dr. Rachel Cranston to identify the attacker . </P>

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