Originally, the scene where Batgirl crashed onto her dad's squad car was supposed to be animated to portray the crash as being head-on, but the network told them to rewrite it as it was far too directly violent.
During his and Robin's escape from the Batcave, one of the items Batman uses as a distraction is Two-Face's giant penny from "Almost Got 'im (1992)".
The lawyer hired by the villains is the same one from "Joker's Millions (1998)". He is a parody on Johnnie L. Cochran Jr., one of the lawyers on O.J. Simpson's defense team during his trial. Much like in "Joker's Millions", Johnnie's infamous line "If the glove doesn't fit, you must acquit" is parodied as "If the Bat's on a spree, Wayne must pay the fee."
This episode marks the only time where Alfred Pennyworth and James Gordon, two major supporting characters in the series, appear in a scene together.
It is somewhat appropriate that Jervis Tetch/The Mad Hatter would lead the lawsuit against Bruce Wayne, as he used to work for Wayne Enterprises before he went crazy in Mad as a Hatter (1992). For that matter, Harley Quinn is pretty much her own expert witness. As a trained and formerly licensed clinical psychologist, when she was Dr Harleen Quinzel, she can diagnose and testify firsthand as to the mental trauma Batman inflicted upon herself and her co-plaintiffs. Whether or not she would be accepted by the court as a credible witness, however, would be another hearing altogether.