clipped from movies.nytimes.com

Harry Potter and the Half-Blood Prince (2009)

In Latest ‘Harry Potter,’ Rage and Hormones

There must be a factory where the British mint their acting royalty: Hero, who plays the dark lord as a spectrally pale, creepy child of 11, is Ralph Fiennes’s nephew, and Frank is the son of the terrific actor Stephen Dillane (Thomas Jefferson in the HBO mini-series “John Adams”). The younger Mr. Dillane, who plays Voldemort at 16, conveys the seductiveness of evil with small, silky smiles he bestows like dangerous gifts on Jim Broadbent’s Horace Slughorn, a professor whose trembling jowls suggest a deeper tremulousness. When Slughorn, the fear almost visibly leaking from his body, shares the secret of immortality with Voldemort, you feel, much as when Ralph Fiennes raged through “Harry Potter and the Goblet of Fire” in 2005, that something vital is at stake.