PARKER AND KNIGHT DISCOVER THREE BODIES ON AN OLD NAVY SHIP WHEN THEY'RE SUDDENLY LOCKED INSIDE BY A MYSTERIOUS FIGURE, ON THE 21ST SEASON FINALE OF "NCIS," MONDAY, MAY 6

"Reef Madness" - Parker and Knight discover three bodies on an old Navy ship that's about to be sunk and turned into an artificial reef, when they're suddenly locked inside by a mysterious figure. Also, Vance offers Knight a unique opportunity, on the 21st season finale of the CBS Original series NCIS, Monday, May 6 (9:00-10:00 PM, ET/PT) on the CBS Television Network, and streaming on Paramount+ (live and on-demand for Paramount+ with SHOWTIME subscribers, or on-demand for Paramount+ Essential subscribers the day after the episode airs)*.

WRITTEN BY: Scott Williams

DIRECTED BY: Jose Clemente Hernandez