Epguides.com: Law & Order - Criminal Intent: Lists the title and air date for each episode. Also offers links to cast information.
IMDb: Law & Order - Criminal Intent: Cast, crew, and production information, as well as viewer comments.
Law & Order: Criminal Intent: Official USA Studios site for the series. Includes production information, cast and crew biographies, episode guide, pictures, and viewer forum.
Law and Order: Criminal Intent Online: Includes articles, episode guides, fan fiction, interviews, links, and sound clips.
NBC.com: Law & Order - Criminal Intent: Official site for the series. Includes production credits, pictures, episode and cast information, and show overview.