Director Edward James Olmos stated in the DVD commentary that he made several homages to The Boy with Green Hair (1948), which starred a then twelve year old Dean Stockwell. Stockwell portrayed Peter Fry, a war orphan whose hair inexplicably turned green when he discovered that his parents had been killed during the Second World War. One example was when Cavil asked the boy John "Are you a war orphan?". This question was asked of Peter Fry several times in The Boy with Green Hair (1948). Olmos also used a still shot picture of Peter Fry from the movie when casting for the character of John the Boy, because he wanted the actor to bear a strong resemblance to how Stockwell looked in his adolescence. Alex Ferris resemblance to Stockwell's picture helped get him cast. At one point, Olmos wanted John the Boy's hair color to be green like Peter Fry's character, but was ultimately overruled by the producers.
The character Giana O'Neill (Simon's wife) was portrayed by actress Lymari Nadal. In the 2003 miniseries that re-introduced "Battlestar Galactica", Nadal played a character with the same first name who was escorted off of Caprica by Boomer. She had drawn the number 127 in the lottery that Helo and Boomer setup for passengers.