David McCallum, who portrays Donald "Ducky" Mallard on NCIS, has appeared less frequently on the show in recent seasons, leading to speculation about his future on the series. McCallum has played the character since the show's pilot in 2003 and is known for his quirks and colorful bow tie collection. Despite his reduced appearances, McCallum has confirmed that he will continue to be a part of NCIS in a limited capacity.

At 89 years old, it is unlikely that he will increase his screen time. If McCallum were to leave the show, it would mark the end of an era as none of the original NCIS season 1 cast members remain. However, his character's reduced presence aligns with the natural progression of aging and retirement. McCallum's career spans seven decades, and even at his age, he continues to make appearances on the show. While his future on NCIS is uncertain, his longevity in the role is a testament to the show's enduring success.