IMDb: Navy NCIS: Naval Criminal Investigation Service
Cast, crew, production information.

CBS: Navy NCIS
Official network site. Includes series overview, cast information, air schedule, and multimedia.

Paramount Television: Navy NCIS
Features upcoming episode information, show description, character and cast biographies, photos, production notes, and episode guide.

NCIS and Company
Features include photos, episode guide, information and games.

NCIS FILES: Tony Dinozzo
Fan site for Michael Weatherly's character. Includes news, multimedia and images feature both the actor and the show.

NCIS Review
A collection of fan reviews of the television military show NCIS.