Harry Potter and the Half-Blood Prince (2009)

Revealing mistake: It is not what is seen here that is the problem, but what we don't see on the Hogwarts Express; first on the way to Hogwarts when Harry, Ron, and Hermione are in their compartment talking about Draco, and second, during holiday break, when Harry and Ron are talking about Unbreakable Vows. As the camera faces the large compartment window, we see the scenery out the window, but as the train speeds along, the scenic reflection of the windows opposite it, in the corridor, should be seen but isn't. What is reflected is the light colored wall of the compartment beneath the blacked-out window. The camera filming the shots from this angle is positioned at that window, and to hide the camera/crews' outline, the window was covered.

Super Grover

Hermione Granger: She's only interested in you because she thinks you're the Chosen One.
Harry Potter: But I AM the Chosen One.

Trivia: Christian Coulson, who played Tom Riddle in the second film, expressed interest in returning for this film, but David Yates felt Coulson was too old to convincingly play the role again. Ironically, Coulson was "too old" to begin with, being almost ten years older than the age group Chris Columbus had set for auditions.

Question: When Harry sees into the past of Dumbledore's meeting with young Tom Riddle, Tom admits that he hurts people if they are mean to him. Since Tom openly admits this with obviously no guilt or remorse, why would Dumbledore take him to Hogwarts to learn magic instead of leaving him at the orphanage?