Characterization
Adama: "I didn't know you were that religious."
Roslin: "Neither did I."
According to executive producer Ronald D. Moore, Roslin's character had a secular worldview at the start of the series, but her experience hallucinating the Opera House in "Kobol's Last Gleaming" makes her believe in the Scriptures. She becomes a woman of faith because she considers it logical given the evidence. Nonetheless, it is new enough that it makes her uncomfortable to argue from religion when trying to persuade Adama to send the Raider to Caprica. Adama is respectful but thoroughly secular by contrast.
According to Moore, Baltar's scene with Boomer reveals a darker, more manipulative side to his character than had been shown in the series so far. Understanding that Boomer is a Cylon and poses a threat, Baltar encourages her to kill herself, a move Moore says not even Head Six may have thought him capable of.
According to Moore, Baltar wanted to sleep with Starbuck from the scene when they first met, in the earlier episode "Water", and only became more interested as she continued to spurn him in later episodes. Six's reaction in "Kobol's Last Gleaming" to Baltar sleeping with Starbuck is the first indication that Six and Baltar have a relationship that is not strictly in Baltar's head.
According to Moore, Starbuck's devotion to Adama is so strong that rational arguments would be unable to persuade her to disobey his orders. Roslin realized that her only option was to show Starbuck that Adama had betrayed her first, and this strategy works.
Read more about this topic: Kobol's Last Gleaming