Legend, Part Two
NCIS Season 6 Episode 23 (05/05/09)
This is the second part of "Legend." In Los Angeles, Gibbs and McGee continue working with the NCIS division in order to track a terrorist cell.
Then there's Agent Callen, goes undercover, while a psychologist uncovers the truth about the relationship between Gibbs and Agent Macy.
Also, Tony fears that Ziva may not be loyal to NCIS.