'NCIS': Dr. Jimmy Palmer's in for a Headache in the Season 18 Premiere (PHOTOS)

Victoria Platt Mark Harmon Brian Dietzen NCIS Season 18 Premiere
Sonja Flemming/CBS

We already know that Special Agent Leroy Jethro Gibbs (Mark Harmon) is going to be sporting a black eye early on in NCIS Season 18 — the cause of the injury we saw last year will be revealed as we go back in time to that mission — but someone else's head will be hurting as well.

In the newest photos for the premiere, "Sturgeon Season," Dr. Jimmy Palmer (Brian Dietzen) looks to be icing his head. What happened to the medical examiner?!

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The episode will see Gibbs and Fornell (Joe Spano) trying to find the leader of the drug ring that supplied those counterfeit opioids to the former FBI agent's daughter. Meanwhile, the team has a case involving a missing cadaver from the NCIS autopsy room. That might begin to explain Dr. Palmer's headache.

Scroll down for a look at Gibbs and Fornell's mission, the case, and more from "Sturgeon Season."

NCIS, Season 18 Premiere, Tuesday, November 17, 8/7c, CBS

Mark Harmon NCIS Season 18 Premiere Leroy Jethro Gibbs
Sonja Flemming/CBS

Gibbs (Mark Harmon)

Joe Spano Fornell NCIS Season 18 Premiere Mark Harmon Gibbs
Sonja Flemming/CBS

They’re on a mission.

Joe Spano Mark Harmon Fornell Gibbs NCIS Season 18 Premiere
Sonja Flemming/CBS

Fornell (Joe Spano) and Gibbs

Wilmer Valderrama NCIS Season 18 Premiere Nick Torres
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Run, Torres (Wilmer Valderrama)!

NCIS Season 18 Premiere Crime Scene
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A bloody scene

Brian Dietzen Palmer NCIS Season 18 Premiere Mark Harmon Gibbs
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Palmer and Gibbs

Palmer Gibbs NCIS Season 18 Premiere Brian Dietzen Mark Harmon
Sonja Flemming/CBS

Is Dr. Palmer (Brian Dietzen) OK?

Ronnie Palmer Gibbs NCIS Season 18 Premiere Sturgeon Season
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What happened here?

Mark Harmon Brian Dietzen NCIS Season 18 Premiere Gibbs Palmer
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Dr. Palmer

Maria Bello Mark Harmon NCIS Season 18 Premiere Jack Gibbs
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Jack (Maria Bello) and Gibbs