National Geographic Episodes on PBS

Case studies and 4-D imaging explore how life begins and is saved, and how hearts beat and brains think. Kate Burton narrates the hour, which follows a woman through a pregnancy that begins with an into-vitro fertilization, and a man through surgery for a brain tumor. Also: “the aerobic limits of the Charlotte Hornets [and the Chicago Bulls] are put to a severe test,” Burton says, in a triple-overtime game; and London cabbies' brains get an equally severe test---the cabbies must display an encyclopedic knowledge of the city's maze of streets to earn their licenses.