For many fans, NCIS began as a natural extension of JAG. For its creator, that label was always a mistake. Donald P. Bellisario fought CBS’s early marketing strategy, concerned that calling the show a spin-off would narrow its appeal.
Bellisario envisioned NCIS as something distinct—a more modern procedural aimed at younger audiences. He worried that tying it too closely to JAG would make it seem like “more of the same,” discouraging new viewers from tuning in.
His concerns weren’t entirely unfounded. Over time, NCIS developed a reputation for drawing a largely older audience in the United States. Bellisario later pointed to international markets like Australia, where the show wasn’t promoted as a spin-off and reportedly attracted a broader demographic.
Still, the series thrived regardless of branding. With over 20 seasons and counting, NCIS proved that strong storytelling can outlast even the most debated beginnings.