AllMovie

A new invention, known as the Paratron and vitally important for America's war effort, becomes the focal point in yet another war-time serial from the Universal B-movie factory. An important missing ingredient is discovered in Alaska, leading the inventor of Paratron, Dr. Miller (Ralph Morgan), his daughter Ruth (Marjorie Weaver), Jim Hudson (Milburn Stone), and the latter's sidekick Bosun (Edgar Kennedy) on a wild chase to get to the secret location ahead of a gang of Fascists led by Dr. Hauss (Martin Kosleck). The usually dignified Samuel S. Hinds, a lawyer turned actor late in life, appeared as Hauss' chief lieutenant, Herman Brock. The Great Alaskan Mystery offered a rare starring role for Milburn Stone, a dependable character actor later very popular as Doc Adams on the television series Gunsmoke.