Time Listings: May 24, 1968

Wednesday, May 22

THE UNDERSEA WORLD OF JACQUES COUSTEAU (ABC, 7:30-8:30 p.m.).* The rebroadcast of the opening program, "Sharks," shows flipper-tipped explorers fearlessly aswirl in a terrifying assortment of hammerheads, blue whalers, tiger and white-tipped sharks.

Friday, May 24

THE BIG LITTLE WORLD OF ROMAN VISHNIAK (NBC, 7:30-8:30 p.m.). Considered one of the foremost photographers of microscopic life, the 70-year-old biologist and zoologist developed a method called "colorization." With this unique process, he transforms scientific subjects into an art show while examining the complex life of microorganisms. Dr. Vishniak's life and work are...