<P> Jonathan Cole ( Scott Wolf ) , alias FBI Agent Casey Stratton , is one of the primary antagonists of season nine . He was formerly a member of `` Phantom Eight '' , a clandestine team of operatives assigned to the Watcher Fleet tasked with protecting the United States Navy . Cole goes rogue some time after the Phantom Eight are disbanded and begins working with Sean Latham , the corrupt Director of Special Operations for the Office of Naval Intelligence and a former member of Phantom Eight himself . Cole and Latham conspire to sell a series of microchips belonging to Phantom Eight members , which give their owners unrivalled access to the Navy mainframe . Cole makes his first appearance in `` Nature of the Beast '' , where he adopts the alias of Casey Stratton , an FBI Agent assigned to investigate a shooting involving Tony DiNozzo . DiNozzo , having forgotten the events that led up to the trauma of the shooting , attempts to reconstruct his memories , recounting his investigation of NCIS Agents Simon Cade and E.J. Barrett . His investigation centers on a microchip Barrett extracted from the body of Gayne Levin , who also served in Phantom Eight , but wound up the last murder victim of Lt. Jonas Cobb , the Port - to - Port Killer . Cole manipulates DiNozzo , Barrett , and Cade into first distrusting one another and then meeting , where he attempts to kill all three before fleeing with the microchip . Cole kills Cade , wounds DiNozzo , and misses Barrett , who flees . He later approaches DiNozzo in the hospital under the Casey Stratton alias , but is unable to kill him as DiNozzo is under guard . Cole reappears in `` Housekeeping '' , where he attempts to kill E.J. Barrett , who has since resurfaced . After the first failed attempt , Latham advises Cole to abandon his mission , but Cole refuses , claiming that he has to see it through , and he murders Latham . Now aware of his role in Phantom Eight and his actual name , NCIS trick Cole into attacking a safehouse under the pretense that Barrett and DiNozzo are hiding there . The safehouse is empty , and Cole is apprehended . His final appearance comes in `` Till Death Do Us Part '' when Gibbs feels he would be an ideal operative to get close to the terrorist Harper Dearing . Cole agrees in exchange for a ( slightly ) reduced sentence , but Dearing is already aware of his role and rejects his offer of help . Cole is killed when attempting to defuse a bomb left by Dearing outside NCIS headquarters . Although Cole never offers a reason for his crimes , and the circumstances that led to his becoming a traitor are never detailed , he does admit that he thought he had good reasons for doing what he did ; he was soon proven wrong . </P>
<P> Jonathan Cole ( Scott Wolf ) , alias FBI Agent Casey Stratton , is one of the primary antagonists of season nine . He was formerly a member of `` Phantom Eight '' , a clandestine team of operatives assigned to the Watcher Fleet tasked with protecting the United States Navy . Cole goes rogue some time after the Phantom Eight are disbanded and begins working with Sean Latham , the corrupt Director of Special Operations for the Office of Naval Intelligence and a former member of Phantom Eight himself . Cole and Latham conspire to sell a series of microchips belonging to Phantom Eight members , which give their owners unrivalled access to the Navy mainframe . Cole makes his first appearance in `` Nature of the Beast '' , where he adopts the alias of Casey Stratton , an FBI Agent assigned to investigate a shooting involving Tony DiNozzo . DiNozzo , having forgotten the events that led up to the trauma of the shooting , attempts to reconstruct his memories , recounting his investigation of NCIS Agents Simon Cade and E.J. Barrett . His investigation centers on a microchip Barrett extracted from the body of Gayne Levin , who also served in Phantom Eight , but wound up the last murder victim of Lt. Jonas Cobb , the Port - to - Port Killer . Cole manipulates DiNozzo , Barrett , and Cade into first distrusting one another and then meeting , where he attempts to kill all three before fleeing with the microchip . Cole kills Cade , wounds DiNozzo , and misses Barrett , who flees . He later approaches DiNozzo in the hospital under the Casey Stratton alias , but is unable to kill him as DiNozzo is under guard . Cole reappears in `` Housekeeping '' , where he attempts to kill E.J. Barrett , who has since resurfaced . After the first failed attempt , Latham advises Cole to abandon his mission , but Cole refuses , claiming that he has to see it through , and he murders Latham . Now aware of his role in Phantom Eight and his actual name , NCIS trick Cole into attacking a safehouse under the pretense that Barrett and DiNozzo are hiding there . The safehouse is empty , and Cole is apprehended . His final appearance comes in `` Till Death Do Us Part '' when Gibbs feels he would be an ideal operative to get close to the terrorist Harper Dearing . Cole agrees in exchange for a ( slightly ) reduced sentence , but Dearing is already aware of his role and rejects his offer of help . Cole is killed when attempting to defuse a bomb left by Dearing outside NCIS headquarters . Although Cole never offers a reason for his crimes , and the circumstances that led to his becoming a traitor are never detailed , he does admit that he thought he had good reasons for doing what he did ; he was soon proven wrong . </P>
who plays ducky 's assistant casey on ncis
who plays ducky 's assistant casey on ncis
Scott Wolf
Scott Wolf