With Ducky temporarily on the shelf following his heart attack, and Brian Dietzen promoted to series regular, things will take a very interesting turn for Palmer when NCIS returns September 25.
Look for Jimmy to step in as acting medical examiner ... for better or worse.
"He really has to take over the reins, [and] it points out both Palmer's strengths and weaknesses," executive producer Gary Glasberg tells TV Guide, hinting that this storyline may span several episodes.
"They work so brilliantly together as a team ... [But] Palmer is assuming a certain role. Inherently, there are moments [of conflict]. There's a great episode down the road when Ducky has to rediscover his mojo."