James Marsters, who did the narration for some of the audiobooks in the series, turned down the opportunity to audition for the role of Harry Dresden because he didn't want to move to Toronto in case the series was produced.
As of May 2006 the Sci-Fi Channel has ordered 11 episodes of The Dresden Files, based on the quality of the pilot. The pilot film itself is scheduled to premiere in January 2007.
The character of Karrin Murphy became Connie Murphy for legal reasons after it was discovered that there is an actual police officer named Karyn Murphy in Chicago.
The episodes were aired out of their original filmed order, and the two-hour pilot was never aired in its entirety during the shows run. An edited version of the pilot, titled "Storm Front," aired in the middle of the first season.
Was originally intended to be a major motion picture, but was changed to a TV series due to the filming of 'Constantine (2005)'
According to author Jim Butcher, he provided each main member of the cast with several of the books in the series. However, Valerie Cruz was the only member of the central cast who had read any of the books prior to filming.
Originally Valerie Cruz auditioned for the part of Susan and Rebecca Mcfarland auditioned for the role of Murphy. Cruz, who read the original book, thought she fit the physical description of Susan.
The "castle" home in which Mr. & Mrs. Jones are said to be living is briefly shown as a real estate listing while Harry is watching Felicity Jones. The address for the home on the listing is 1060 W. Addison, the address of Wrigley Field in Chicago.