You thought Agent Parker (Gary Cole) had a lot of authority on NCIS? Think again. Denise plays the Secretary of the Navy in "Pledge of Allegiance." Given the security threat level of the case, the Secretary of the Navy gets involved with the NCIS team as they work to fix the issue of the stolen key. She informs the team that it would take at least 36 hours to change the key. This means, until then, whoever possesses the key would have the power to attack the U.S with its own drones.
Thankfully, our trusty Team Gibbs (they'll always be Team Gibbs in our hearts) solves the case. It turns out Rafi was innocent. His wife used him all along, and she was the actual traitor.
While it's uncertain if Denise will return for future episodes of NCIS as of January 2022, it would be great to see her return to the series!