Wouldn't it have made more sense to switch the names of these stations? The Pearl is a station that moniters a second station without them knowing, ie a Looking Glass (yes, I know that's a mirror, but in Through the Looking Glass, the novel, it functions as something else). The Looking Glass is an underwater station communications station that is hidden from immediate view (like a pearl inside a clam/oyster). The Looking Glass's title doesn't make any sense at all except that it contributes to the title of the third season finale.

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