@62a04c04 NGL, McCallum remained in the opening credits past becoming NCIS historian leaving the medical examiner's office at NCIS. (i.e. He wasn't on the show any more) And I wondered why. I noticed he'd do a single episode each season & I always wondered if Mark Harmon made that possible so that McCallum could still participate in SAG's Healthcare plan in his twilight years. (Mark was notorious for taking care of his cast, even as he was retiring.) RIP Ducky. #ncis #davidmccallum #ducky https://files.mastodon.social/media_attachments/files/111/128/229/091/297/094/original/ecda66e0bdd39539.jpg