In the grand scheme of things, 22 years isn't really long enough to classify something as a tradition, but with NCIS , the title definitely feels like one. When the show first aired, it was compelling because the cop procedural focused on military-related cases through the Naval Criminal Investigative Service. Every single spin-off afterward began its title with the acronym , whether the franchise was simply expanding to a new location and cast like in NCIS: Los Angeles , or shifting their perspective back in time with NCIS: Origins .

The newest spin-off, NCIS: Tony & Ziva , has already started setting itself apart from the franchise by moving away from a cop procedural structure and adopting a more overarching crime drama approach. But during this year's San Die

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