ObscureHollywood.net’s review published on Letterboxd:
In 1943, England is preparing to invade Sicily, heavily armed by the Germans. The British high command expects severe losses in the invasion. The commanding general requests intelligence officer Clifton Webb to come up with a scheme to convince the Germans that Greece is the actual target and thus induce the Germans to reduce the troops and armaments on Sicily.
The film is the story of the conception and realization of Webb’s plan. The title refers to an officer, William Martin, whose body washes up in Spain. German acceptance of a letter carried by Martin is the centerpiece of the plan.
An interesting, nicely-paced film is well acted by a mostly British cast. The presence of Americans Webb and Gloria Graham presumably added US box office appeal.