This weekend’s hot, fresh and highly anticipated programming on PBS is six years old! How can his be? Fans of “The Great British Baking Show,” who are legion, already know the sordid tale behind the kitchen counters and pastel-colored Kitchen-Aid mixers of the BBC and Channel 4. But before any further crumbs of information are served up, it should be said that this serving of “GBBS” is as good as any of its predecessors. Or, depending on your side of the Atlantic, descendants.
Beginning with a double episode Friday (and...