[N 1] The Warner Bros. B picture was based on a 1918 play Three Faces East written by Anthony Paul Kelly and produced on the stage by George M.

Posing as a refugee named Frances Hautry, she infiltrates the London household of Arthur Bennett, a cabinet minister, and, coincidentally, Frank's father.

When Bennett's secretary, also a German spy, taps out a secret message in code on her typewriter, Yeats is present and recognizes it.

When Valdar escapes through the coal shute, Hautry unlocks the door and informs Yeats about the bomb, revealing that she is a double agent.

[4] Morse's remake of Three Faces East "... is clearly one of those cheap and fast quickies the studios - in this instance, Warner - ground out at the onset of war, as the sheerest propaganda.

British Intelligence was typical of prewar American propaganda films, similar to other Warner Bros.

[6] Some later reviewers saw it as a clumsy attempt to portray German aggression in Europe at the start of World War II.

"As a balm to 1940 audiences, the film includes an early comedy scene in which German military protocol is upset by a clumsy corporal (Willy Kaufman) who bears a startling resemblance to a certain Nazi dictator.

The Radio Times notes that "this is an intriguing thriller... the wilful obscurity of the storyline is part of its appeal, along with Karloff's sinister geniality.