The Harry Potter Movies Dropped The Ball With Half-Blood Prince's Most Ironic Cliffhanger

Harry Potter and the Half-Blood Prince ended with an intriguing cliffhanger, but the movies never fully delivered on this in the same way as the books. While Dumbledore's death was the primary focus of this story's ending, one particular mystery was left unsolved until Harry Potter and the Deathly Hallows. In the books, this led Harry, Ron, and Hermione to discover some dark truths about Voldemort's Horcruxes, as well as one of the Harry Potter series' most ironic and tragic stories. Unfortunately, the Harry Potter movies cut this woefully short.