How easily we forget... After Mac & Webb went missing in Paraguay, Harm (in his usual mood of being entitled to be read in to any classified op that he felt interested in) failed to get permission to go to P to find them, so he resigned. When they came back, Mac was welcomed (she'd been officially TDY'd) but Harm was "Mr. Rabb" as a) this was the second time he had left JAG, and b) this time he had actually resigned.
So he mooned around a bit, got recruited as a CIA pilot (and seemed to have a blast doing it), and managed to get his face live on ZNN after landing a Hercules on an aircraft carrier, so he was out at CIA. Eventually he and Chegwidden reconciled and he rejoined JAG.
So, Rabb's Navy career was:
Naval aviator who crashed because of an eye condition which exonerated him from blame for the crash while simultaneously grounding him.
JAG lawyer whose eye condition had been mis-diagnosed and was fixed with a surgical procedure thereby re-qualifying his flight status and leading to his determination to ditch JAG and return to his One True Calling.
Old Man Aviator who was flying just fine and had maturity as compared to the (much) younger hotshots, who it turned out was too old to have a viable career as a Navy Aviator.
JAG lawyer who "realized JAG was where he belonged" while everyone was supposed to ignore the obvious fact that he'd never catch up in Navy aviation after 10-12 years grounded.
Guy with a hero complex who was the only person who could save the day in Paraguay and therefore was good with quitting his job and going all in.
Hero who helped save the day and expected to be welcomed back to JAG for a second time only to learn that Chegwidden had read Maya Angelou (paraphrased here as: when someone shows you their true desires, believe them).
CIA pilot (and loving it) (In my opinion DJE absolutely nailed it as a real pilot - real pilots love to fly and will meet the challenge to fly anything).
Unemployed moody brooder.
JAG lawyer who eventually bets it all on a coin toss (and apparently next week we may learn how it landed - I was rooting for on the edge).
Naval aviator who somehow in fifteen years did the thing that wasn't going to be possible, perhaps skipped past being CAG and is now XO of an aircraft carrier (and its group?).
Future carrier CO? I understand there's significant "office politics" skills required for career advancement at that level, and Harm was always a bridge burner. But this is Show, not Life, so who can say?
Of course this also means he's held the rank of Captain for fifteen years, and I thought there were time limits on that - two chances at promotion in something like ten years, and then you must retire. Again, this is Show, not Life.