The "Eye" was a supernova that occurred 4000 years ago. D'Anna, promted by the hybrid goes to the planet. In the temple, she learns the identities of the final five Cylons (the ones who are not spoken of). Baltar thinks he is one, and hopes he is as he would then not be a traitor. Baltar is captured and will be not be a popular guest back on Galactica.
Athena gets the baby (Helo kills her to transport her into a new body on the Cylon ship) , and Caprica Six helps her escape because she believes the children are our future.
Apollo also commands Dualla to risk her life to rescue a shot down Starbuck. Not a decision that will be popular with the wife.
5 out of the final 5 Cylons.