We are happy to say that we are beginning to add closed captions to many of our videos! You will notice the symbol near the volume controls on the player when closed captions are available for a video.
Each series home page also has a list of available subtitles in the "Language" section.
The process of creating closed captions takes a good amount of time, but we will be working hard to steadily add content with closed captions as fast as we can. It is possible that closed caption may never be available for certain content.