The crew of a deep-sea trawler face a series of life-threatening challenges on the open ocean. While the ship battles brutal weather and treacherous icy conditions (the metaphorical "black ice" of the sea), the plot centers on the internal and external conflicts of the sailors.
Godfrey Grayson
Ben Williams
Bert Harris
Claude Kingston
Johnny Dodds

Barry Keegan
Mick

Maureen Davis
Jean
Hilda Fenemore
Lillian Dodds