The move player command will teleport you to any NPC you choose. The second involves using 'center on cell' commands. The first is using a 'move player' command. While some folks use this to exploit infinite gold or turn on God Mode, we're going to use it to teleport. From here, you can input a number of codes to tell the game what to do. You can resurrect some of these NPCs if you have the means, but mostly it's just a gruesome holding cell. Pretty much any character - especially NPCs you can interact with - who gets killed in some fashion will end up in this room, their bodies piled up in the center.

Should you step through one of these gaping thresholds, you'll simply get ported back to the center of the death room. You probably also thought that once those bodies were looted for gold and lockpicks, they simply disappeared into Oblivion never to return.