Continuity mistake: The timeline in the episode is inconsistent. Right after the first courtroom scene, we see the three sisters at home, and Phoebe says that "Cole was an angel in that courtroom yesterday." Later, Cole says that he regrets the criminal being let go, "today." But they are talking about the same events.
Continuity mistake: When Prue talks to Piper after stopping her phone conversation, she tells her that "the Sin Balls work a lot faster than [they] thought. Once infected, the victim only has a few hours before it drives them to total self-destruction." However, this is almost verbatim what was written in the Book of Shadows. It could be easily read by the viewing audience when the book entry was shown. So all three sisters should already know this.
Continuity mistake: When the girls are saying goodbye to their father, Phoebe hugs him around the neck, then lowers her arms while they talk. When her father says "About anything," her left arm jumps back up to being around his neck, and in the next shot, it's down at the side again.