As Colonial forces assist civilian teams gathering food on the algae planet, Starbuck and Apollo enjoy a liaison behind the backs of their spouses, Anders and Dualla. When Apollo suggests that they each get divorced, however, Starbuck refuses. She doesn't mind bending the rules of marriage, but she believes that divorce is sacrilegious. Because Apollo thinks that secretive cheating is equally wrong, they're at an impasse.
Tyrol, meanwhile, feels an inexplicable inspiration to leave the algae worksite and hike alone over the scrubby hills to a strange rock structure. Inside it, he discovers the lost, ancient Temple of Five, where the Eye of Jupiter-- a mysterious object that points the way to Earth-- is supposedly hidden.
Before the humans can find the Eye, however, four Cylon baseships arrive. Baltar and D'Anna, also inspired by potentially divine means, have guided their fleet here, and they want the Eye for themselves. After the rest of the human fleet Jumps to safety, the Galactica hosts D'Anna, Boomer, Cavil, and Baltar for negotiations. There, Boomer tells her counterpart, Athena, that Athena's daughter, Hera, is alive in the Cylon fleet-- revealing that Roslin lied about her death. Adama shuts down the negotiations by declaring that if the Cylons make any aggressive moves, he'll launch nuclear strikes on the planet so that no one can have the Eye.
Secretly, however, D'Anna has already sneaked a Centurion raiding party onto the planet's surface, the moment her fleet arrived in the system. Speculating that just such an ambush is possible, Apollo mobilizes his people on the ground to defend the Temple-- or destroy it, if they must. Even though he already guesses the truth about Apollo and Starbuck's affair, Anders grudgingly helps Apollo organize the civilians into a fighting force.
Then they receive an urgent message from Starbuck in her Raptor: she has spotted the raiding party of Centurions headed their way. Before she can say more, the Centurions shoot her down. Frantic to rescue her, Anders tries to leave the Temple, but Apollo can't spare the personnel and refuses to let him go.
Hemmed in by growing threats from all sides-- and from above-- the two men's furious standoff is only the prelude to a much bigger fight. Worse, aboard the Galactica, Gaeta discovers that the planet's sun is poised on the brink of a supernova. It could explode at any moment, with enough fury to vaporize humans, Cylons-- and the entire solar system.
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