While not one of my favorite Lang, I find it to be one of his most stylistically interesting. The sets in each scene, especially the indoor scenes, have a sense of isolation. In other words, none of the scenes feel like they connect, as if they each take place in their own alternate reality. This is usually a negative, but here it's so odd that it adds something to an otherwise decent adventure film.
Moonfleet might disappoint some hardcore Fritz Lang fans. Being one, I can empathise. It is a significant departure from Lang's dark, stylish, and atmospheric noir. Instead, this film is a campy period drama with the set design of a primary school play, and these attributes did irk me. However, I felt this film redeemed itself by with the strong character development of the empathetic anti-hero.
Following four black and white noir dramas, Fritz Lang directed this two million dollar Cinemascope costume piece for MGM; a handsome film, a marginal failure, and the end of the line for Lang and the studios. His remaining American films are low budget independent crime dramas, ending a turbulent yet prolific two decades in Hollywood.
I saw this one on theater and loved it. In spite of having the same dense atmosphere of all Lang movies it is a very atypical movie from his US period. There is a certain kindness and tenderness that you do not find in any of his other movies. Anxious to see it again on DVD.