The setting is a cross-country train trip in the United States during World War II (hence the name of the play, in contrast to the popular patriotic war anthem entitled Over There).
Outside of Disney, the Shermans also saw the release of Huckleberry Finn (MGM/UA) for which they authored both the songs and the screenplay as well as a hit Broadway musical, Over Here! starring the Andrews Sisters and John Travolta.
Somerville made her Broadway debut in the musical Over Here!, which starred Janie Sell, and the then-surviving Andrews Sisters (Maxene and Patty).