"Calypso's Search for Atlantis" is an equally unforgettable episode in which Cousteau lends his resources to the quest for answers to an ancient mystery: Was there really an Atlantis, or was it a folk legend or allegory passed along by Plato? Whatever the answer, Cousteau's team turns up some startling evidence of advanced stone formations lost beneath the sea off of islands near Crete. Underwater images of ancient sunken ships also in the area--a veritable graveyard of commercial transport spanning thousands of years--are spooky and fascinating. Also worth watching are "Time Bomb at Fifty Fathoms," about pollutants in the ocean; "Search for the Brittanic," a stirring piece about the mystery behind the enormous, British passenger ship sunk during World War I; the fantastic "Blind Prophets of Easter Island"; and the weird "Clipperton: The Island Time Forgot," a sensational story of human isolation and abuse in a desolate place. --Tom Keogh