Diagnosis Murder Fanfiction Challenge: Stories, challenges, list of beta readers, and submission information.
Diagnosis Murder.co.uk: Episode guides, fan fiction, images, cast information, and message board.
Diagnosis: Fan: Cast and character bios, quizzes, trivia, and gallery.
DiAl Dm FoR DiAgNoSis MuRdEr: Pictures, cast information, and reviews of books based on the series.
IMDb: "Diagnosis Murder" (1993): Cast, crew, and production information.
Martha & Abbie's World: Character and episode guides for seasons 3-8.
Melissa White's DM Site: Cast profiles, trivia, and fan fiction.
TV.com: Diagnosis Murder: Episode guide, cast and crew information.