The team gets called in when Mosley becomes a person of interest in the murder of a cartel hitman and they must track her down before she crosses the line - and without the special prosecutor knowing.
While assisting the team with an undercover operation, an informant is arrested; Callen meets with ATF Agent, Anna Kolcheck, who remains on suspension following her last joint case with NCIS.
Members of the NCIS team are in danger after their pictures, as well as Mosley and her son's names are included on a cartel hit list. Mosley is questioned about the off-the-books mission in Mexico.
Season 6 Episodes 23 and 24