During production, Office of War Information officials reviewed screenplay revisions and prints of the film and commented on them. By reviewing the scripts and prints, OWI officials exercised authority over "Mission to Moscow", ensuring that it promoted the "United Nations" theme. An administration official advised the film's producers to offer explanations for the Nazi-Soviet Pact and the Red Army's invasion of Finland. After reading the final script, in November 1942 the OWI expressed its hope that "Mission to Moscow" would "make one of the most remarkable pictures of this war" and "a very great contribution to the war information program".