This episode takes place on Day 58 of the Demetrius mission to find Earth. The mission began immediately after the events in the episode "Six of One."
Kara pilots a Viper with the name plate of Diana "Hardball" Seelix.
Goof: When Tigh, Tyrol and Foster are shown in the teaser, Colonel Tigh is wearing the rank insignia of an admiral.
The pendant Baltar takes from Lily does not feature the rod of Asclepius, which has only one serpent, but the Caduceus, which has two serpents. The Caduceus is associated with Mercury and commerce, rather than healing, but these two symbols are often confused in the United States.
In the "Previously On" segment, during the scene in which Cally listened in on the meeting between Tyrol, Tigh, and Tory, a shot of Sam was used, implying that he was present during this meeting and that Cally knew the identities of all four of the hidden Cylons. However, this was not true as Sam was onboard the Demetrius on the mission to locate Earth and was thus absent from the meeting.
When the Raptor crashes during the emergency landing, its nose and front section are torn off from the impact. When Chief Tyrol and Figurski are examining the wreck in the maintenance bay, the nose and front end are still attached.
During the Raptor crash, two bodies can be seen ejected from the cockpit as the wreckage slides across the landing bay after the front of the Raptor is torn off. The bodies are only visible for a couple of frames. This explains how Racetrack and Skulls were able to survive.
Nitpick: Cally and Galen sleep with their heads at the end of the bed that is farthest from Nicky's crib. In Season 3, and in Cally's flashbacks of their lovemaking, they sleep with their heads at the other end of the bed.
In the scene where the rebel Cylon fleet jumps into the ambush, the stars of the Orion constellation are visible on the left side of the screen, including the three prominent stars that make up the "belt" of Orion.
Lee Adama joins the Quorum of the Twelve in this episode as the Colonial delegate representing Caprica.
The action in this episode takes place three weeks after the events of the previous episode, "Six of One."
Kara Thrace's crew aboard the freighter Demetrius includes at least nine other individuals. Among them are Sharon "Athena" Agathon, Karl "Helo" Agathon, Felix Gaeta, Diana Seelix, Lt. "Gonzo" Pike, the unnamed tattooed pilot (played by Leo Li Chiang), and Kara's husband, Samuel Anders. At least one of the crew members (Anders) volunteered for the mission (to find Earth).
On the wall behind Lee and Admiral Adama during Lee's farewell is a plaque containing rank patches for some US Air Force enlisted and ROTC ranks.
As Lee receives his official farewell, he shakes hands with all major characters from the Galactica, except Colonel Tigh. This is a subtle acknowledgment to their respective grudges dating back to Lee's mutiny in "Kobol's Last Gleaming, Part 2."
The model numbers of all seven human-form Cylons (not including the Final Five) are revealed in this episode:
No. 1 - Cavil
No. 2 - Leoben Conoy
No. 3 - D'Anna Biers
No. 4 - Simon
No. 5 - Aaron Doral
No. 6 - Number Six
No. 7 - ???
No. 8 - Sharon Valerii
When Starbuck flies alongside Apollo in the Season 3 finale ("Crossroads, Part 2"), the side of her Viper has no nameplate on it. However, in this episode (which is the Season 4 premiere), the nameplate that reads "Kara Thrace 'Starbuck'" is visible once she lands aboard Galactica. The action in this episode takes place immediately after the events of the Season 3 finale.
In the Season 3 finale, Anders has a very noticeable limp, which is visible when he's following Chief Tyrol to the flight deck. However, in the Season 4 premiere, he has no limp at all even though the story takes place during the same day.
Samuel Anders reveals that he was born on Picon (or so he believes).
After the conversation between Tigh and Adama regarding the music that Tigh was hearing, Tigh says, "There's too much confusion" and "There must be some kind of way out of here." These are lines from "All Along the Watchtower," the song that is featured in this episode.
Before Lampkin questions Tigh, he discusses Tigh with Baltar and Lee at the table. Lampkin holds a glass of water that is about two-thirds full. As the camera view shifts, the glass is only one-third full. Lampkin did not have time to drink any water in that fraction of a second.