The students are back from the Christmas holidays and Harry already has an appointment scheduled with Dumbledore for the following day. In the memories he shows Harry, we learn the fate of Tom Riddle's relatives and that Tom is looking for more information about something called a "horcrux." Join hosts Alison and Katy, returning guest Irvin, and new guest Zoe as they dive into the pensieve to learn more about Voldemort's past in Chapter 17 of Half-Blood Prince, "A Sluggish Memory."