characters in those scenes are different people... he really painted those characters differently." Edits were still being made to the script during filming, as the writers wanted to introduce a new element to Data, in order to further distinguish him from Lore: an inability to use contractions. Data had used contractions during earlier episodes, and Spiner refused to shoot the scene until a final decision was reached; production stopped while there was a meeting on this subject between Gene Roddenberry, the producers, and the writers, in the middle of the bridge set. The music for the episode was composed by Ron Jones, and was later released on the second disc of the album Star Trek: The Next Generation: The Ron Jones Project. For this episode, Jones created a six-note theme to represent Lore. The crystalline entity was given a theme of three notes which played through two pieces entitled Crystal Entity and Crystal Attacks. The music played when the away team explore Omicron Theta was similar to that created by Jerry Goldsmith for the 1979 film Alien. Jones acknowledged that link saying that, "I was playing with the stuff like Jerry's music at the beginning of Alien, Bowman was like our Ridley Scott—he was like Ridley Scott Jr. and I was Jerry Goldsmith Jr." Executive producer Maurice Hurley was pleased with the outcome of the episode, saying "The sets, the design of it and the look of that show was brilliant, I thought that might have been the best-looking show of the first season". However, he felt that the characterisations were not quite right. This was the same opinion as that put forward by actor Brent Spiner, who portrayed both Data and Lore, who thought that Data's actions were not in line with his expectations of the character. This episode was the second and last appearance of Biff Yeager as Chief Engineer Argyle. He was the only one of the Chief Engineers introduced during the first season to appear twice, with Geordi La Forge (LeVar Burton) gaining the role in season two. Wil Wheaton later recalled that the stand-in actor used in this episode really irritated Spiner, and was never used again. He described the stand-in as looking like "a break dancer doing the Robot" whenever he had to portray Data or Lore, and said that "I think the guy was really into playing an android, and his enthusiasm got