“Revelations” is episode ten of season four of the new Battlestar Galactica and the mid-season finale.
In the previous episode, “The Hub”, when the base star arrived at Adama’s location, constellations, noticeably Orion, could be seen, showing they were close to Earth.
On Galactica, Starbuck finds Apollo in his father’s quarters. They talk, about getting to Earth and the absence of Roslin and Adama.
The base star is less than an hour away. Regarding the Final Five, D’Anna says there are four in the fleet. She won’t say who they are, as the humans might kill them. Roslin says they need them to find Earth. Leoben suggests cooperating; D’Anna points out that didn’t work out so well on New Caprica. She’s going to hold the rest hostage until the four are safely onboard. She and Adama will head across in a Raptor. Roslin tells Adama to go, and whispers to him that they can’t let the Cylons get to Earth.
After the jump, the Raptor heads to Galactica. On the flight deck, D’Anna looks at Tory and Tigh, Tyrol and Anders. She explains she’s holding the rest hostage until they get the Cylons. She’s already been in contact with them and, now they know they have nothing to fear, they should find a way of joining them. Apollo says if they want to go, he won’t stop them. D’Anna says she will wait on the base ship. Tory says she will go with Roslin’s medication; Tigh protests, but one more hostage isn’t believed to be significant.
In his quarters, Adama tells Tigh, Apollo and Starbuck that Roslin wants the base ship destroying if they can’t stop the Cylons from getting there. But it’s Apollo’s call, as president. Apollo agrees that Roslin is right; they lose the four and they lose Earth. If everything goes south, destroy the base ship and everything on it.
Planning the mission, Tigh wants other options. Starbuck suggests the four Cylons could give themselves up. On the base ship, Tory is being introduced to the other Cylons. Roslin is treating Gaius Baltar’s injury; he tanks her for essentially not murdering him. Which can’t have been an easy decision. Tory is brought in and explains she came to be with her people. If Roslin had no idea she was a Cylon, she should ponder what else she’s been wrong about. Roslin asks Tory to try to convince D’Anna to back down and release the hostages. Tory is done taking orders from Roslin.
Someone is spaced from the base ship and D’Anna contacts Galactica. She’s just executed the first hostage and will kill another every quarter of an hour until her people come home. Apollo gives the admiral to go ahead for the rescue mission; if it fails, destroy the base ship.
Tyrol is on the hanger deck, Anders is at a pilots’ briefing, Tigh is in CIC and Tory is on the base ship when they all hear the music again. All but Tory meet at Starbuck’s oddly new Viper. Something has changed. Anders suggest Starbuck could help; she flew it to Earth. Tigh says to find her and heads to the admiral’s quarters. He tells Adama to scrub the mission; the Cylons will kill every hostage before they get aboard. Adama wants options. Tigh has one. He should have told Adama when he found out but didn’t have the guts. Tigh explains about the music, and that it was a Cylon signal. He’s a Cylon. Adama has known Tigh for 30 years. He used to have hair. He’s never heard of a Cylon aging. Tigh says it doesn’t mean they don’t. Before the attack on the Colonies, they didn’t know skinjobs existed. Now there’s another kind, and he’s one of them. D’Anna will back down if Adama threatens to flush Tigh out of the airlock.
Adama doesn’t take Tigh’s revelation well. Nor do others. There is something about Starbuck’s Viper, and the situation between the Cylons and the fleet are getting tense. Apollo is willing to space Tigh; D’Anna isn’t convinced. She’s also willing to destroy the fleet. If they don’t sort matters out, and quickly, everyone will die.