Cally's last name of Henderson had been originally put forth in the tie-in novel "Sagittarius Is Bleeding" by Peter David. However, that same book said her full first name was "Callista" rather than Callandra.
The weapons locker where the cylons meet is labeled 1701D. A tribute to the USS Enterprise 1701D from Star Trek The Next Generation.
Human Survival Count: 39,675.
Aaron Douglas reads the "Previously on Battlestar Galactica" at the beginning of the episode.
In the tight shot of Tyrol working on the flight deck, you can see the brand "Jackson" on his HSL-100 passive lens welding helmet.