: The team is shocked to learn that Kasie Hines has been conducting an internal investigation for months on behalf of the Defense Criminal Investigation Services (DCIS) to identify a mole within NCIS.
(Sean Murray): Hints at a personal secret of his own that is teased throughout the season. [S20E6] The Good Fighter
(Diona Reasonover): The central figure who reveals her secret undercover role. : The team is shocked to learn that