During the dinner scene, Jamie Bamber's reaction to "Ellen" sliding her foot against him under the table is genuine. He was not told beforehand that Kate Vernon would do that.
When Gaius in his laboratory and Six appears to him, we can hear the song "Battlestar Operatica", which is a humorous opera-like song. The lyrics, which are sung in Italian, like most operas, reference Baltar's relationship with the Cylons and specially Number 6, and they say things like "Your Cylon heart is cursed" and "Your girlfriend is a toaster".
In the miniseries, Col. Tigh ('Michael Hogan') is seen burning a picture of his wife which, in reality, is a picture of executive producer David Eick's wife. However, this scene had to be re-shot for the series when Kate Vernon was cast as Tigh's wife.
This episode was originally called "Secrets and Lies" and was a dark story, but since the previous episode was really dramatic, the producers decide to change it into a comedy.
In this culture, all papers and documents have clipped corners, thus, 8 sides or edges. Oddly, the photo of Ellen that Saul crumples in his quarters is rectangular, with no clipped corners.