This is definitely one of the better documentaries I have seen looking at family relationships and marriage. I saw "capturing the friedmans" a short while ago and have to admit I thought this was better.
The story is not an incredibly shocking one, but it is a great examination of trapped personalities and relational cold war. Block deftly guides the viewer through diaries, family footage and after-the-fact interviews; his interview style is sensitive and probing, and his insights are clear and measured.
51 Birch Street is a great examination of personalities and relationships over 40-50 years of social change, the social fallout, and potential for redemption.