Television, that relentless blazer of old trails, opened some fresh territory for a change last week. On NBC, retired Astronaut John Glenn, 46, premiered his Great Explorations series with "The Trail of Stanley and Livingstone." And on ABC, The Undersea World of Jacques-Yves Cousteau cycle was launched with "Sharks."
Glenn, on leave from the board chairmanship of Royal Crown International, retraced Henry Stanley's 1,000-mile trek, from Bagamoyo to Ujiji, in what is now Tanzania. The New York Herald headline hunter took 71 months to reach Missionary David Livingstone in 1871. Glenn...