Battlestar Spoilers!!

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Kara Thrace is back from the dead in the third season finale of "Battlestar Galactica," claiming to Apollo (Jamie Bamber) that she not only knows where Earth is, she's already been there.
Of course, the humans in the fleet know of only one race that can die and come back to life again, and they certainly aren't human. So Starbuck (Katee Sackhoff) is met onboard the Galactica with machine guns in her face, and a new place to live ... behind bars.

What is really behind Starbuck's reappearance? Is she the fifth and final Cylon?

"You can imagine what Galactica officers are feeling when they see Kara resurrect," a source told SyFy Portal. "It is going to be almost impossible for anyone to trust what her motives are, but they will eventually have to trust her if they are ever going to fine Earth."
Adm. Adama (Edward James Olmos) decides that he will eventually need Starbuck, and decides to send her on a mission to help locate the planet they've been looking for almost from the beginning.

That's where the mysterious ship Demetrius comes in. Members of the recent SciFi Channel Digital Press Tour -- which included SyFy Portal -- had a chance to see some of the interior of the Demetrius under construction. Set designers giving the tour wouldn't reveal the name of the ship, but it was later revealed that the ship was called the Demetrius, and was a smaller, older ship compared to what had been seen previously on "Battlestar Galactica."

Not much was known about the ship or what role it would play in the fourth season, but it appears Adama sends Starbuck to the ship, undercover, because apparently that's the only way they will be able to find the planet.

Adama himself is caught between a rock and a hard place, and not sure whether he should go back to treating Starbuck like the daughter he never had, or keeping her locked up in a cell. In fact, Adama -- in a way to clear his mind -- takes off in a Viper (yes, the "Old Man" will get a chance to fly a Viper) -- and turns an asteroid field into dust while he tries to make up his mind.

"This was something Eddie wanted to do for a couple seasons now," the source said. "We're going to show a younger version of Adama flying a Viper in 'Razor,' so why not show the star in one as well?"

Of course, Adama still can't let the rest of the fleet know that he may believe what Starbuck is saying, so most of what Kara is doing is known only to to the leader of the fleet. But what Kara finds could answer a lot of questions as to what the Colonials will find once they reach Earth.