Longstreet photo with scores of episodes attached to it

There are a great lot of episodes attached to this photo of 1970's series Longstreet: https://www.imdb.com/title/tt0066681/mediaviewer/rm1849924865/ 

If it were a general poster or photo for the series (or a season) as a whole, I'd simply delete the episodes via the regular route, but this seems to be a photo from a specific episode, but I don't know which one, so I don't know what I can delete.

If someone knows which episode it's from, please delete all the other episodes. If no one knows, can a staffer delete all the episodes please?