Sherilyn Fenn was originally chosen to play the part of Harley Quinn.
The map of New Gotham is identical to one used in the Batman comic book cycle "No Man's Land", which is also the name of the metahuman bar in the show.
In the Lady Shive episode, there's a pair of street signs on a corner that read "Adams" and "O'Neill", referencing the highly revered writer/artist team that made many Batman stories in the '70s.
The character of Dinah was originally intended to be a revision of the comic book character Black Canary. Outcry from comic book fans contributed to the character being retooled to become the Canary's daughter instead (with the Black Canary herself making an appearance in one episode).
Helena is a bartender at the Dark Horse Bar. Dark Horse is the name of a popular comic book company that on occasion collaborated with DC Comics on special Batman publications.
The series was cancelled in January 2003, with 11 episodes aired. The producers were, however, allowed to film the final two episodes of their 13-episode commitment, and these episodes aired in February 2003, with the final episode retooled in order to close off the various storylines in the series, an unusual privilege for a cancelled series.
Brandy Ledford was considered for the part of Barbara Gordon/Batgirl/Oracle.
The pilot features a reference to fellow WB series Smallville: Helena Kyle mentions to Barbara Gordon and Dinah that meteors sometimes cause mutations. Inside reference: "Birds of Prey" and "Smallville" are both produced by Tollin/Robbins Productions.
Helena Kyle is a combination of the comics' Silver Age (Helena Wayne) and Modern (Helena Bertinelli) Huntresses. She possesses Helena Wayne's genealogy and Helena Bertinelli's personality.
Based on the DC comic book series. The comic first started out as a one-shot special that teamed up Black Canary and Oracle. Response was so successful, a few more specials were released and finally an ongoing comic.
Maggie Baird is not the actress who portrayed Catwoman in the pilot episode of Birds of Prey. She played Mrs. Redmond, the foster mother of Dinah, and is given a credit as (Mother). Because of this credit many people assume she was playing Selina Kyle/Catwoman, the mother of Helena/Huntress. In fact the actual actress who portrayed Selina/Catwoman was uncredited and remains unknown.
Actor Bruce Thomas who played Batman in the pilot episode previously played Batman in a series of commercials for Onstar that featured the character.
When Huntress and Gibson enter the bar, Gibson turns a statue, just like Bruce Wayne did in the original Batman TV series to enter the Batcave. In Batman, the button was concealed in the neck of the statue.
In the first scene of this episode we see a battle taking place at an intersection called Adams Street and O'Neil Street. Dennis O'Neil was the Batman Editor and writer from the mid eighties until his retirement, while Neal Adams was a famous Comic Artist during the O'Neil Batman era that worked closely with him on many projects.