The kind-hearted and often endearingly awkward NCIS medical examiner. Starting as Ducky's assistant, he grew into a skilled and compassionate professional, balancing scientific precision with genuine empathy for the deceased and their families. Known for his nervous energy, quirky humor, and occasional rambling, Jimmy is deeply loyal, emotionally intelligent, and always eager to help. Beneath his soft demeanor lies a resilient man shaped by personal loss and growth.