In 1964, director Michael Apted interviewed a group of seven-year-old British schoolchildren for a BBC television documentary called "7 Up." Apted, now known for directing such features as "Coal Miner's Daughter" and "Gorillas in the Mist," has since returned to film these subjects every seven years. They are now 49. Roger Ebert, who lists the "Up" series among his ten greatest films of all time, interviewed Apted in London for the release of the latest installment, "49 Up."