Deliberate mistake: A witness during the murder trial says she was home watching "Boston Public." That series was also created by David E. Kelley, but takes place in the same fictional reality as "The Practice," as evidenced by the two series having a two-part crossover earlier in the season in which Ellenor defended a coach from being fired.
Continuity mistake: Scott Wallace says his wife's life insurance policy was renewed around May, which ADA Richard Bay says was a month before her death. However, the videotape of Scott's supposed confession is dated Sept. 1999. Much of the argument over if the tape can be admitted as evidence is about Scott's emotion not being a confession, but grief over his wife's death being too recent, implying only hours or days had passed. Bay's statement of the timing would thus date the tape for June 1999, not Sept.
