Previously, Leoben was a very clever Cylon, in addition to being a nutjob. Kara beat him up super-bad but prayed for him when he died; later, he kidnapped her and kept her in an apartment and made her super-duper crazy. Which she kind of already was, because her mom was not a nice lady, but it certainly didn't help. Also: all of this has happened before, and all of it will happen again. In the apartment, he swore that he was just trying to show her "the truth of her life," and the reasons she suffered and struggled and acted like a world-class a-hole a lot of the time. Everybody was talking about this mysterious destiny of hers, but nothing was really going on with it, even after the Temple of Five proved to be a monument to her doodles. Then we kind of forgot about her altogether so we could concentrate on labor laws. The previouslies end on her conversation with Helo about how the Eye of Jupiter in the Temple was the same one he saw in her apartment in Delphi. (That last link is to the episode titled "Valley Of Darkness." No fear.)
Previous to that, a girl got kidnapped on the coast of Sicily; she was taken away by a dark spirit, into the underworld, where she became a woman. If her mother had known what was going to happen -- if she'd know that this was her fate, that it keeps the world turning -- who knows what she would have done differently? Sometimes it's better to just close your eyes, especially when the Gods are involved. The girl's name was Persephone, or Proserpina, or a thousand other names; we'll call her "Kore" now. It means "daughter." What is your name? Maybe last time, she was the interrogator and he was the prisoner. The players change, the story remains the same. He kept her down there, and it changed her. Maybe he told her she had a beautiful daughter, perhaps. With a name like Kore, or Kat. Or Kara. Homer called what she became down there the Iron Queen, and she only relented once. Empedocles called her water: "Now hear the fourfold roots of everything: Enlivining Hera, Hades, shining Zeus. And Nestis, moistening mortal springs with tears." Elysium, where the dead and burnt-out wraiths of mortals make their home, comes from the word for a person struck by lightning: enelysion. It's where you go when you're a hero and you've reached your end of line; it's the place Persephone rules. It's encircled by the stream Oceanus, which goes around and around, and never ends.