the SEALs, he is able to withstand torture due to SERE training required for all special forces operators and detach himself emotionally during investigations. Although usually reticent about his service, Sam has hinted several times about how his experiences overseas has affected him: he mentions about getting help in "Field of Fire" when interviewing a homeless veteran who was distrustful of him and admits to Nate Getz in the episode "Impact" of his worries that he would one day lose himself. Hanna has a strong sense of duty and becomes particularly indignant when the criminal is from a military background. In the episode "Vengeance", he was forced to interrogate a group of SEALs about their involvement in the death of a Navy officer suspected of leaking classified information and was visibly affected, leading Hetty to observe that she felt like she was "making him interrogate his family". In the final episode of season 11, "Code of Conduct", when investigating claims that a SEAL chief petty officer has murdered an unarmed prisoner, it is revealed that Sam is widely known and respected long even after his service ended, with multiple SEALs willing to defy their chief's orders after he reveals his presence. In the two-part crossover episode with Hawaii Five-0 it is revealed that he is friends with head of the Five-0 Task Force and former SEAL Lieutenant Commander Steve McGarrett, although the story of how they met has yet to be addressed. Storylines In the season two finale, Hanna resigns from NCIS along with Callen and Kensi in order to follow Hetty's trail to Prague without Director Vance's authorization. It is revealed in the episode "Greed" that Hanna has been working undercover on a joint CIA task force in Sudan for the past year. His teammates had already been suspicious due to Hanna uncharacteristically turning up late for work and taking leaves of absence. During the investigation he crosses paths with fellow undercover operative Michael, and Hanna said that he "pulled some strings" to get them into the USA. In this episode, Hanna is once again hunted by the Taliban. Later, it was revealed that Amir was working for a terrorist named Habib. His mission is to kill Sam, "the one that got away". Sam was trapped inside their boat shed and beaten up by Habib's men with Callen, Kensi and Deeks launching a rescue operation which was successful, resulting