fiction films such as E.T. the Extra-Terrestrial and The Thing were eschewing the synthesizer in favor of more traditional orchestras. Craig Huxley performed his invented instrument—the Blaster Beam—during recording, as well as composing and performing electronic music for the Genesis Project video. While most of the film was "locked in" by the time Horner had begun composing music, he had to change musical cue orchestration after the integration of special effects caused changes in scene durations. ThemesThe Wrath of Khan features several recurring themes, including death, resurrection, and growing old. Upon writing his script, Meyer hit upon a link between Spock's death and the age of the characters. "This was going to be a story in which Spock died, so it was going to be a story about death, and it was only a short hop, skip, and a jump to realize that it was going to be about old age and friendship," Meyer said. "I don't think that any of [the other preliminary] scripts were about old age, friendship, and death." In keeping with the theme of death and rebirth symbolized by Spock's sacrifice and the Genesis Device, Meyer wanted to call the film The Undiscovered Country, in reference to Prince Hamlet's description of death in William Shakespeare's Hamlet, but the title was changed during editing without his knowledge. Meyer disliked Wrath of Khan, but it was chosen because the preferred Vengeance of Khan conflicted with Lucasfilm's forthcoming Revenge of the Jedi (renamed Return of the Jedi late in production). Meyer added elements to reinforce the aging of the characters. Kirk's unhappiness about his birthday is compounded by McCoy's gift of reading glasses. The script stated that Kirk was 49, but Shatner was unsure about being specific about Kirk's age. Bennett remembers that Shatner was hesitant about portraying a middle-aged version of himself, and believed that with proper makeup he could continue playing a younger Kirk. Bennett convinced Shatner that he could age gracefully like Spencer Tracy; the producer did not know that Shatner had worked with Tracy on Judgment at Nuremberg (1961), and was fond of the actor. Meyer made sure to emphasize Kirk's parallel to Sherlock Holmes in that both characters waste away in the absence of their stimuli; new cases, in Holmes' case, and starship adventures in Kirk's. Khan's pursuit of Kirk is central to the film's theme of vengeance, and The Wrath of Khan deliberately