You know you're in for a grand odyssey when you embark on "Angels in America." The epic six-hour flight is composed of two parts, the first showing on HBO at 8 p.m. Sunday and the second set for Dec. 14. The first view is intoxicating. You sail above cotton-candy clouds drifting over San Francisco's Golden Gate Bridge; it feels like heaven, until the clouds clear and we're staring down at the gray Mormon Temple in Salt Lake City. We cruise next past the Gateway Arch in St. Louis and end up in New York City, where we meet the five...