The "silent enemy" of the title is hunger.
Contains one of the very first zoom lens shots in cinema.
The caribou of the film's climax are reindeer obtained by the film's producers from The Lomen Reindeer Corporation, which harvested reindeer for their meat.
The earliest documented telecasts of this film took place in Chicago Monday 16 August 1948 on WGN (Channel 9) , in New York City Wednesday 24 November 1948 on WPIX (Channel 11), in Salt Lake City Thursday 4 January 1950 on KDYL (Channel 4), and in Los Angeles Sunday 16 April 1950 on KNBH (Channel 4).