Draco Malfoy takes a darker turn in Half-Blood ... wants to impress him. However, Severus Snape steps in and does an Unbreakable Curse with Draco, which means he'd do the deed if Draco failed.

The Harry Potter HBO TV series has yet to officially cast a single actor in a single role, however, there have been reports of who it is eyeing for many major roles, including Snape, Dumbledore ...