I downloaded all 13 chapters and most of them were jerky and scenes were skipping.I fixed the problem by using a video converter.I converted all 13 files to the avi format and it worked great

Set during WWII, largely on politically neutral Shadow Island in the far east, populated by spies and wanted criminals, this is a well-produced, high energy serial, and was fun to watch. Lloyd Bridges and Keye Luke head a cast that is surprisingly good for the most part, and that really made a difference during the back and forth of the middle chapters. I recognized a number of B-movie actors among the bad guys.

The story centers on a discovery that a Japanese chemist made that requires a formula languishing in an American laboratory. The dialog was on par for a movie serial, to wit: The screenwriters had various bad guys reiterate this secret discovery in every chapter until it came out in the open at the end. When are they going to say it? Dialog between the head Japanese agent and the owner of the island was often repetitive, too. Oh, the tension! They also had a Japanese character say 'Ah so.' in almost every chapter, and a German character occasionally spoke gobbledygook as German. I think there was some gobbledygook spoken as Japanese in an early chapter or two, too.

Many different sets were used during the middle chapters, which always helps to cut the tedium. Most of the cliffhangers were resolved believably, but there were some silly escapes, and those were fun. Unbelievable situations, plot holes and plot conveniences weren't as numerous as in other serials, but there were those magical pistols that never empty. Of course, hats stayed on heads no matter what, and no one changed their clothes.

I downloaded the MPEG4 files. Video and audio quality are fine.