With the DS9 Documentary looking to HD-ify some key scenes from DS9, I'm really looking forward to finally seeing the station in HD. Although the likelihood of seeing the whole series remastered in HD remains remote, there may be a possibility that CBS could be persuaded to release a special edition boxset with perhaps 4 key episodes remastered. So, if you could only choose one episode to be remastered in HD, which would it be?