Secret Mission is a 1942 British war film directed by Harold French and starring Hugh Williams, James Mason, Nancy Price, Carla Lehmann and Roland Culver.

[3] British Army Major Peter Garnett assembles a team consisting of Captain ‘Red’ Gowan, Private ‘Nobby’ Clark and Raoul de Carnot, a member of the Free French forces, during the Second World War.

They contact a local businessman, M. Fayolle, now hated by most of the townspeople for his open collaboration with the occupying forces, but in fact secretly working with the French Resistance.

They are able to photograph a map showing troop disposition, and also extract a great deal of information from the unwary Nazis, who suspect them of being either Gestapo or counter espionage.

M. Fayolle and his daughter, Estelle, arrive to speak to Raoul, revealing their role in the Resistance to Michele, risking their lives.

At the tree, Private Clark shows up in the armored propaganda truck (nicknamed the “Music Box”) which he has just hijacked.

Leonard Maltin described it as a "Stiff-upper-lip WW2 drama" that is "Well paced dramatically," but whose "comical touches seem awkwardly out of place";[4] while the Radio Times noted, "There's a modicum of excitement" in the efforts of the various characters "to glean information about Nazi invasion plans.

But the comic subplot involving Wilding and his French wife, and the romance that develops between Williams and Mason's sister (Carla Lehmann), are embarrassingly twee.