Continuity mistake: As the students are departing the Room of Requirement and all thanking Harry, the group of students around Harry completely changes between shots. It's especially noticeable as the boy with shoulder-length brown hair passes Harry twice.
Continuity mistake: The lead singer of Green Day disappears in the shot from behind the drummer's back - he is nowhere to be seen, even though where he was standing before means he should be visible from that angle.
Question: I haven't yet seen this episode, but why is it called 'Mr. Monk and his 100th case'? Natalie and Julie gave Monk a hundred trophies at one time for doing 100 cases. Doesn't that break continuity, then if THIS is his 100th case?