There can be a few reasons for this. For many older shows closed captions were available during broadcast but have since been lost. Sometimes we simply don’t have the resources available to add subtitles to our releases. We understand this is sometimes frustrating, but we do our best to note on our website which products do and do not have these features. You can confirm if a title has subtitles and/or closed captioning by checking each product description page and looking in the Product Information grid.