Edward James Olmos (Commander Adama) plays a man involved in a search for dangerous androids who are nearly impossible to distinguish from humans. He played a man in a very similar situation in Blade Runner as Gaff. Amusing coincidence.
The "Weapons Locker" being used by the 'new' Cylon foursome as a meeting place is designated "1701D", a clear reference to producer Ron Moore's previous work on "Star Trek: The Next Generation" where the U.S.S. Enterprise was designated "NCC-1701D".
Tricia Helfer's character "Number 6" was named as a tribute to the 1967 series "The Prisoner".
When Laura Roslin is in the doctor's office, just before the doctor walks in and tells her about having cancer, there is a wide camera shot through the large ceiling window of ships flying by outside. If you look closely you will see one of the ships is Serenity from the TV show Firefly.
The guy who plays Lt. Brendan 'Hot Dog' Costanza is really Edward James Olmos's son Bodie.
After several discussions with Edward James Olmos and viewing the movie, Tricia Helfer decided to base her character on the replicant Roy Batty from the film "Blade Runner."
In the commentary on the episode "Pegasus," Ron Moore states that behind the scenes, Number Six had been nicknamed "Gina" in response to the derogatory nickname critics had labeled the series - GINO (for "Galactica In Name Only). For Razor, the Number Six model aboard the Pegasus was eventually named Gina on-screen.