Screencaps update
I made some NCIS season 3 screencaps for the episodes Deception (313), Bait (318) and Bloodbath (321). You can find the download links in the screencaps post.
I'm sorry I never responded to any of the requests. Sadly, I lost all the caps I already had on my computer but not yet uploaded. However, if you want caps for any specific NCIS (season 1-3) episode, please let me know and I'll see what I can do.