Sons of the Sea is a 1939 British colour drama film directed by Maurice Elvey and starring Leslie Banks, Kay Walsh, Mackenzie Ward and Cecil Parker.

The film premiered in London on 11 March 1940, at the then recently opened Cinephone cinema at 241 Oxford Street,[citation needed] with the attendance of the main star, Leslie Banks.

There is clever and natural character drawing – MacKenzie Ward jumps right into his own as a disarming foreign agent – to round off the healthy, inspiring and exhilarating illusion. ...

Maurice Elvey, doyen of British film directors, brings all his experience and proven flair for popular showmanship to bear on his treatment of this picture.

"[8] Today's Cinema's reviewer commented that "With its topically appealing title, its surge of espionage incident, its stirring angles of filial devotion and its panoramic backgrounds of cadets on parade performing this or that manoeuvre, the development has all the essentials which make for popular success.