Some plays can make dandy movies. Take Sleuth, for instance, one of the best ever. Or you can just film the play, which I usually prefer. See Dustin Hoffman in Death of a Salesman. But “opening it up” can be a big mistake, as in The Crucible, even with a screenplay by Arthur Miller. This film has good intentions, the cast works very hard, and the themes are intriguing, it’s definitely for grown-ups (though you don’t really need to know anything about math) … but it just didn’t jell for me.