Cracked Shield
Fan made art, music, and video's.
http://www.freewebs.com/st_team_hq/crackedhome.htm

EpisodeGuides.com: The Shield
Episode guides divided by season.
http://www.episodeguides.com/scripts/getshow.php?s=theshield&p=index&m=html

EpisodeList.com: The Shield
Character images, summaries of episodes, and lists of writers, directors, and characters.
http://www.episodelist.com/shows/view.php?show_id=86

FX Networks: The Shield
Official network site for the series. Includes episode guide, cast and character information, video clips and downloads, and message board.
http://www.fxnetworks.com/shows/originals/the_shield_s4/main.html

IMDb: Shield, The
Cast, crew, and production information, as well as viewer comments.
http://us.imdb.com/title/tt0286486/

PopMatters: The Shield
Review by Cary O'Dell that suggests the series' success could affect what networks will allow in terms of sex, violence, and profanity in order to secure ratings.
http://www.popmatters.com/tv/reviews/s/shield.shtml

The Shield
Analysis of the episodes and pictures.
http://www.morethings.com/fan/the_shield

The Shield Fanfiction Archive
Automated archive that holds stories in a variety of genres. Submissions accepted.
http://whipper.speedis.org/theshield

theSHIELDfans.com
Episode guide, character and cast profiles, photos, fan art, screen captures, sound files, and chat.
http://theshieldfans.com

TheShieldRap
Message board for discussion of episodes, characters, spoilers, and behind the scenes information.
http://theshieldrap.proboards45.com

The Visual Shield
Includes screenshots, slide shows, and wallpapers.
http://www.geocities.com/movieimages/shield.html

Yahoo! Groups: The Shield Talk
Moderated group for discussion of the series. [Age statement and Yahoo! registration required.]
http://groups.yahoo.com/group/theshield-talk/

E! Online News: "The Shield" Loses Advertisers
Article noting that sex, violence, and profanity cost the series some sponsors. (April 10, 2002)
http://www.eonline.com/News/Items/0,1,9786,00.html