Aww, man. 

#RIP David McCallum, who starred as Illya Kuryakin alongside Robert Vaughn’s Napoleon Solo in the 1960s hit spy drama “The Man From U.N.C.L.E.” and had a supporting role as pathologist Dr. Donald “Ducky” Mallard on the top-rated series “NCIS” decades later, died Monday of natural causes in New York City. He was 90.

https://variety.com/2023/tv/news/david-mccallum-dead-ncis-man-from-uncle-1235734772/