The Castle is a modest little comedy from Australia that falls into the subgenre of Capraesque idealism, in the little-guy-triumphs-over-evil-powers-that-be division. The story revolves around the unpretentious Kerrigan clan. Darryl (Michael Caton), the father, has his own little towing business. Sal (Anne Tenney), the mother, is the family cook and…