Before NCIS became a television institution, its identity was a point of contention. Creator Donald P. Bellisario resisted CBS’s push to market the series as a spin-off of JAG, arguing that the two shows served different purposes.
Bellisario envisioned NCIS as a more energetic, youth-friendly procedural. By contrast, JAG had established itself with an older audience. Linking them too closely, he believed, would blur that distinction and limit the new show’s reach.
His concerns extended beyond branding. Bellisario later suggested that the spin-off label influenced viewer demographics, particularly in the United States, where NCIS became especially popular among older audiences.
Despite these debates, the show’s success speaks for itself. Renewed again in 2026, NCIS continues to dominate—proving that even contested beginnings can lead to lasting impact.