There's 1 NCIS Show You Need To Watch If You Miss Gibbs' Original Team

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One NCIS series emulates Gibbs' original team, and it's a must-watch for those who miss the beginnings of the original NCIS from the early 2000s. The flagship NCIS series launched the franchise in 2003. It was a spinoff of the 1990s legal procedural JAG, which introduced NCIS in a double-feature episode that served as the series' backdoor pilot. The original NCIS Major Case Response Team for the Washington D.C. Office debuted on JAG, and with it, characters such as Gibbs, Ducky, Tony, and Abby entered the shared NCIS universe.
Hannah Postlethwait

https://screenrant.com/ncis-sydney-show-watch-miss-gibbs-original-team/