Arriving out of the wild blue yonder for silent film buffs is this serial from the tail end of the silent era, running just over three hours in ten chapters.
The setting is a flying company owned by an elderly gentleman (C.H. Allen) who has invented a few handy devices like a radio-controlled Flying Torpedo and something called an aerometer for flying through fog. Alas, a masked Pilot X (the actor continually identified as “?” in the title cards) keeps raiding the joint and causing all their planes to crash, which at a certain point puts a crimp in the business. Ace pilot Jack Baker (Walter Miller) and the owner’s daughter Shirley (Eugenia Gilbert), a crack pilot herself, investigate while carrying on their implicit romance.