This is partly so that you'll always know where to look for the latest episode. The old episodes likewise stay where they were, archived forever. A lot of Enterzone 's threads run from episode to episode, so you may find yourself reading a different episode if you follow a link that leads backward. If your connection makes it impossible or unfeasible to see pictures, for example, you can go to the Writing page and see an all-text zone. Bookmarks, hotlist entries, favorites, call it what you will.
Every browser has some method of saving a web address to a list for later reference.
Other browsers create a local page on your computer and take you to it when you want to see your bookmarks. Personally, I think you should make bookmarks all the time. And of course I'm biased, but if you make an Enterzone bookmark, you're as good as subscribed, since future episodes will appear at that same address. Take your time and really enjoy the zone. If you're concerned about a sluggish connection or even a relatively speedy modem, you might want to turn off automatic image loading.