Original movie title was "Day Without End".
This story was originally done on the CBS radio show Suspense as "To Find Help" on 18 January 1945 with Frank Sinatra as Howard and Agnes Moorehead as Mrs. Gillis (Mrs. Gordon in the film). This was Sinatra's "dramatic debut" on radio. It was done again on Suspense with Gene Kelly and Ethel Barrymore on 6 January 1949.