Ducky has not left the series yet, despite taking a much small role following season 16. He retired from his position as NCIS's Chief Medical Examiner with his former assistant, Dr Jimmy Palmer (Brian Dietzen) taking over from his position.

Does Ducky leave NCIS in Season 15?

Ducky's departure is the latest blow to NCIS fans.

“It was a decision made last year. I hope everyone will love and enjoy EVERYTHING ABBY not only for the rest of this season but for everything she has given all of us for 16 years,” she wrote at the time of her exit.

What happened to Duckie on NCIS?

In March 2019, Ducky retired from his position as NCIS's Chief Medical Examiner with his former Assistant, Dr. James Palmer succeeding him. Following his retirement, he assumed the newfound position of NCIS Historian. He is the son of Victoria and Joseph Mallard and the older half-brother of Nicholas Mallard.