NCIS episode where Ducky identifies old John/Jane Doe?

Trying to remember what season and specific episode where Ducky identifies his only long-term/old John/Jane Doe (he's previously been unable to identify the person for many years).

Can anyone point me in the right direction?

Thanks in advance!
Update: Nevermind, I discovered it was episode 4, from season 2 entitiled, "Lt. Jane Doe".
Update 2: First person to respond gets best answer. I just want to close this question and allow for others to find this info.
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