These multi-parters are prime candidates for remasters. The reason they were originally cut into multiple parts (sometimes as many as 4!) was technical - lot of footage and action, but most users were on connection speeds that would have left them waiting hours to download such a massive file (not to mention the content delivery systems and options available at the time and cost of bandwidth or even limits with localized storage) made cutting them up the most efficient and user-friendly option. That's less an issue today, so combining 'em into a single file makes way more sense. Strip Poker episode from our holiday remasters a couple months ago was an example of this - originally 3 parts, I think, now combined into a single file!