The W Plan is a 1930 British spy film produced and directed by Victor Saville and starring Brian Aherne, Madeleine Carroll, Gibb McLaughlin, and Gordon Harker.

When the film was released in the United States, Aherne was appearing in The Barretts of Wimpole Street on Broadway, and receiving praise for his performance as Robert Browning.

Grant is chosen because he speaks fluent German, having spent a significant amount of time in Germany prior to outbreak of hostilities.

It consists of a very elaborate series of underground works which are being dug beneath the British controlled territory, in order to collapse their lines.

Mordaunt Hall of The New York Times gave it a very positive review, applauding the acting of Aherne and Madeleine Carroll, and calling the picture, "... an exciting and splendidly staged English espionage melodrama," and the "... most satisfactory production sent over here from the Elstree Studios.