Over the years, NCIS has spawned numerous spin-offs (with the show itself being one, branching off from '90s military series JAG), and recently, it has been intentional in the way it delivers these shows. The most popular ones, NCIS: Los Angeles and NCIS: Hawai'i, retained the same cop procedural structure and NCIS feel with a new cast in a new location. But NCIS: Origins gave us a completely different tone, focusing on character-centric stories and heavy themes rather than cases. Now, NCIS: Tony & Ziva, arguably the most highly-anticipated spin-off of the lot, just completely breaks the mold, opting for a huge genre shift to re-introduce two beloved characters.