Hart To Hart Online: Keeping the Harts Alive  
   Episode guide, downloads, pictures, cast profiles (including Freeway the dog), and information on the Harts' lifestyle.
   http://www.geocities.com/harttohartonline

Hart Home  
   Includes cast biographies, episode guide, production details, candid and episode photos, and interviews.
   http://users.hunterlink.net.au/~lmcvd/harts/harthome.htm

Hart to Hart Episode Guide  
   Includes credits and other details for the various segments.
   http://www.geocities.com/Hollywood/9821/harts.txt

TV Tome: Hart to Hart  
   Episode guide with cast and crew information.
   http://www.tvtome.com/tvtome/servlet/ShowMainServlet/showid-1314/

Hart to Hart by Meredy  
   Images, sounds, free downloads, and electronic postcards based on the series.
   http://www.meredy.com/hart2hart/

Hart To Hart Online  
   Includes behind the scenes information, current TV listings, cast information, downloads, and episode guides for the series.
   http://hartsonline.users.btopenworld.com/

IMDb: Hart to Hart  
   Cast, crew, and production information, as well as viewer comments.
   http://us.imdb.com/title/tt0078622/

Yahoo! Groups: Hart 2 Hart  
   Discussion and chat about the series, the actors, and related memorabilia. [Yahoo! registration required.]
   http://tv.groups.yahoo.com/group/hart2hart/

Yahoo! Groups : Hart to Hart  
   Mailing list and photo sharing. [Yahoo! registration required.]
   http://tv.groups.yahoo.com/group/harttohart/