Watch this movie once, with the idea that Fr. Flynn is guilty. Then watch it again, with the idea that he is innocent. Or do it the other way around. Shanley's dialogue is so perfectly, brilliantly ambiguous that this is really two movies in one. Both are powerful, and both possibilities are horrible to contemplate, for very different reasons.
Having seen both the play (during its original run with Cherry Jones and Brian F. O'Byrne) and the film, the play obviously has the edge because it's more intimate, consisting only of four characters. The film expands its milieu (as film versions of plays typically do) but I think having the schoolchildren, other nuns, and school staff present in the film diminishes it just a bit. The play, of course, is about "knowing" things that we don't actually know, and the movie shows us some of what the play leaves to the imagination. Although the ultimate question remains ambiguous, the viewer may be distracted by looking for clues in the other characters, especially the kids.
What gives this piece its power, though, on both stage and screen, is its stubborn refusal to answer that ultimate question, or to provide any solid evidence of either conclusion, leaving it entirely up to the viewer to judge these characters.
