The last of six voyages with Clare Francis
Narrated by Laurence Olivier

In recent years man has explored and mapped the previously unknown seven-tenths of the globe-the sea bed; he has discovered new rich fields of minerals and new life forms; he has begun to harness the power of the sea as energy. In her final voyage, Clare Francis sails with a US scientific expedition, and in the tiny submersible, Alvin, dives more than a mile to the bottom of the ocean.

"Miss Francis makes an ideal personality to guide us on this fascinating voyage with her confident expertise and her easy storytelling style. She packs a lot o/ fun as well as information into it" (Daily Express)

A Malone-Gill production