The article compares the cast of the popular TV show NCIS, highlighting the changes that have occurred over the years. The cast was first introduced in 2003, and several members have since left, while others have joined. The article emphasizes the evolution of the cast by examining their appearances and careers then versus now.

The main focus of the article is on the lead actors, Mark Harmon and Sean Murray, who have been part of the show since its inception. They have aged and their physical appearances have changed over the years.

The article acknowledges that while the original cast members have made significant contributions to the show, the addition of new cast members has brought fresh energy and perspectives. It mentions the departure of Michael Weatherly, Cote de Pablo, and Pauley Perrette, who left the show after many seasons. The article notes that although their departures were initially met with disappointment from fans, the show has successfully continued with the introduction of new characters.

Overall, the article highlights the changes in the NCIS cast over the years. It acknowledges the influence of the original cast members and their contributions to the show, while also recognizing the importance of new additions in keeping the series fresh and exciting for viewers.