Benson episodes missing from multiple seasons.

There are at least 20 episodes of the show benson missing, almost every season is missing some random episodes, I know it isn’t a licensing issue as some of the missing episodes are “part one” of a two part special, and “part two” still remains.

If someone could look into this and restore them it would be great. I have Roku to watch shows like this and I hate having to look elsewhere for episodes I should have right here on the Roku app. 
Thank you.