 Jamie Pearson was responsible for editing the episode. The sequence where Lucas rescues Harry and Ruth near the end were made in slow motion, because the producers felt it would add to the tension. The incidental music was composed by Paul Leonard-Morgan. The computer graphics on the episode were designed by Mark Doman. The producers ended up being receptive of both Morgan and Doman's work, because of their ability to help interpret the story via the music, and computers, respectively.
