Continuity mistake: When the Charmed Ones' father, Victor, came to San Francisco in episode 1-3: "Thank You for Not Morphing," his last name was Halliwell. But when he came back in the third season and later, his last name was Bennett.
Continuity mistake: When Cole catches Phoebe's karate kick at her school, her foot is up near Cole's shoulder, but then moves down much lower. (00:18:20)
Continuity mistake: In the scene where Cole has caught Phoebe's karate kick at school, Phoebe's hands are both clutching her school books. In the following shot, her left arm is in a completely different position, and there's no reason for her to have moved it. (00:18:25)
Continuity mistake: When Cole gives Phoebe his card on the school campus, it disappears and reappears between shots. (00:23:25)
Visible crew/equipment: After Phoebe tells the others that Emilio will be getting arraigned at night court in an hour, when it cuts to Leo and the sisters walking in the court hall, the shadow of the boom mic is moving at the top, left side of the screen. (00:33:45)
Visible crew/equipment: At the start of the final courtroom scene, when the first shot is on Cole with Morris behind him, the boom mic is visible over Cole at the top of the screen. (00:34:25)
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.
Audio problem: When Phoebe hits Cole over the head in the courtroom, the sound of something unfreezing is heard, but Cole wasn't frozen and Piper doesn't unfreeze the room until a few moments later.
Continuity mistake: In the season 2 finale the council has five members and yellow robes, in this episode they're now called the triad and there are 3 members in red robes (changed to black robes with inverted pentagrams in later seasons).
Magic Hour - S3-E2
Visible crew/equipment: When Prue and Phoebe see Piper arrive home, a boom mic dips into the shot. (00:01:30)
Magic Hour - S3-E2
Continuity mistake: In this episode, Phoebe says "Grams, you were married four times." But in "Lost and Bound," Phoebe tells Cole that Grams was married six times.
Magic Hour - S3-E2
Revealing mistake: In the attic when the sisters are talking about the "rutabaga," some of the shots of Piper are reversed, her "broken" eyebrow is on the wrong side.
Magic Hour - S3-E2
Continuity mistake: When Piper and Prue are talking to Brooke outside, Piper's arms change from being crossed to having her hands on her hips between shots.
Continuity mistake: When Kate was drawing the trolls in one shot she had a peach coloured crayon, and in the next shot she had a purple crayon.
Continuity mistake: When the trolls attacked Piper outside P3, her bag got flung into the shadows, but in the next shot, her bag was right next to her, and in the light.
Visible crew/equipment: After the Grimlocks enter the manor Leo calls for Piper then rushes out of the kitchen, and when it cuts to the shot of the dining room the edge of the crew's black mat is visible at the bottom of the screen. The black mat is again when the sisters are pulled into the time portal, though the only thing we should be seeing is the fringed area rug. (00:04:00)
Other mistake: Approximately four minutes into the episode, two demons go to the manor. Pru catches them and "throws" them to the one side. Her arm motion would fling them to the right, but they fly to the left. (00:04:15)
Plot hole: When Phoebe and Cole are using the apple peel to find out her true love how does she not recognize that it is Cole? Even with the mask it's very clear that it is him.
Suggested correction: I was thinking the same, but it's possible she thought he was an ancestor/past life of Cole. When she visited her own past life, she recognized everyone there because of their "souls" so maybe she thought the same with him. Although you'd think they'd acknowledge that a little.
Revealing mistake: When Leo dropped the Grimlock potion, it was obviously fake when it hit the ground.
Continuity mistake: When Piper and Prue are standing in the bedroom with Charlotte, Prue's hand moves from covering her mouth in one shot, to being by her side in the next.