Current population as of this episode: 47,887 (as seen on the whiteboard behind Roslin's desk). Ten people were lost between last episode and the beginning of this one.
When Boomer shoots the second time, the squib under the victim's jacket can be seen detonating, apart from the flash from the gun.
When Kara shoots the glass case containing the Arrow of Apollo at the Delphi Museum of the Colonies, a cameraman can be seen on the other side of the display case.
In this episode, there is a fight between Six (Tricia Helfer) and Katee Sackhoff's character Starbuck. The actresses decided to do their own stunts. Tricia threw Katee into a real vase, resulting in a large bruise. They thought all the props around them were made of breakaway material.
Current population count as of this episode: 47,897 (written on the whiteboard behind President Roslin's desk).
When Starbuck is presenting her plan to attack the Cylon baseship, she says the decoy ships will jump to a position at "extreme radar range" from the Cylons. The Colonials use a scanning system called DRADIS, not radar.
When Adama gives Apollo the lighter, he asks Apollo if he can see the engraving. Apollo replies he can barely make it out. It very clearly reads Joseph Adama.
The fleet has lost 68 people since "33," and according to Baltar its population is now 47,905.
During the scene where Baltar looks at the hundreds of vials and talks to Number Six about how hopeless it is, the music playing in the background is "Battlestar Operatica," which was written for the episode by Bear McCreary rather than using Mozart.
The lyrics are in Italian and mean the following:
Woe upon your Cylon heart
There's a toaster in your head
And it wears high heels
Number Six calls to you
The Cylon Detector beckons
Your girlfriend is a toaster
Woe upon your Cylon heart
Alas, disgrace! Alas, sadness and
The toaster has a pretty red dress
Red like its glowing spine
Number Six whispers
By Your Command
During the scene where he is speaking with Lt. Gaeta from an adjacent bathroom stall, Baltar whistles a portion of the anthem from the movie Top Gun, although at a faster tempo than the original version.
When Kara enters the hangar bay, she hands her crutches to Lee, who grabs both of them with his right hand. Immediately after that, when the view changes to a wide shot, Lee is seen with one crutch under each arm.
One of the buildings on Caprica has a very large and very obvious Scotiabank symbol on it. As it was a white building, it should have been easy to remove.
We learn that Cylon Raiders are partly organic.
According to the numbers on the white board on Colonial One, there are over 47,000 civilians in the fleet.
About 25 minutes into the episode, Boomer is searching for the source of a signal. She searches through and knocks over a bookshelf. Among the books on the shelves were Raise the Titanic! (1976) by Clive Cussler, Burr (1973) by Gore Vidal, Daughter of Silence (1961) by Morris L. West, The Warbirds (1990) by Richard Herman, Jr., The Final Diagnosis (1997) by James White, Puppet on a Chain (1969) by Alistair MacLean, The Burning Mountain (1983) by Alfred Coppel, The Second Seal (1950) by Dennis Wheatley, The Angry Tide (1979) by Winston Graham, The Holcroft Covenant (1978) by Robert Ludlum, a book by Doris Lessing, a book by Eric Ambler, a book titled Night Sky and a book with the word "Oberst" on it. (It is unclear whether that is the title or the author's name.) Another book, possibly a spy thriller, has a swastika on the cover.
As Starbuck trains her laser sight on Zarek, the beam crosses the corner of his left eye. He would easily see this and react.
Boomer discovered that seven of the G-4 detonators were missing from the container in the early scene, those labeled A1 through A7. She returned A7 but discovered that A1 through A6 were still missing.
Sharon "Boomer" Valerii's serial number is shown to be T-990429.
Lee becomes the President's Military advisor.
Baltar says there are 45,265 civilians in the fleet. Given the stats of total fleet population in the last episode, that means there are 2,708 military personnel in the fleet.