David McCallum, known for his role as Dr. Donald ‘Ducky’ Mallard on the TV show NCIS, has passed away at the age of 90. He was the last remaining original cast member and appeared in over 500 episodes. In his final scene on the show, he delivered a pivotal piece of dialogue, revealing the plans of a terrorist group. While it was believed that his character would retire and the actor would leave the show, David never formally announced his departure and there were hints of a possible return.
