Once again, a sitcom has captivated my attention and interest.  Not too bad, considering it’s a form I’d completely written off a few years ago.  But “Sons & Daughters” is yet more proof that there’s still life in the American sitcom.  A single-camera show, sans laugh track, “Sons & Daughters” is a partially improvised comedy about Cameron Walker and his insane family.  In the first episode, we find the family preparing for their mother and step-father’s twentieth wedding anniversary.  The day of the party, Wendell – Cameron’s step-father – confesses to Cameron that he’s thinking of leaving his wife.  Cameron isn’t quite sure how to handle this information and begins to talk it over with his wife and his sister, even though Wendell asked him to keep quiet.  The show isn’t quite as over-the-top as “Arrested Development” could be, but its subtle comedy warms the cockles of my heart.  Plus, I loved the moment Cameron’s children drew a Hitler-mustache on their racist great-aunt.