Andrew Lau’s American debut “The Flock” opens with a disturbing factoid: There are over half a million registered sex offenders in the United States, and for every thousand, a single person is assigned to monitor them. And that’s just the registered sex offenders, mind you; that...

So what happened to that Richard Gere and Claire Danes thriller “The Flock”? News about the film surfaced last year, and got a lot of people interested not because of Gere or Danes (really, are these two still stars?), but that Andrew Lau would be making his Hollywood directorial debut with...