A notable plot change was the renaming of a character from the original version of "The Beginning" to accommodate a plot device in "The Interrogation". In "The Interrogation", Craig Stirling is ostensibly being quizzed on the activities of one Julius Retford, who remains unseen. For the film, the opening credits explicitly identify Retford as the character named Ho Ling (played by Ric Young) in "The Beginning". This allows the germ warfare theme of "The Beginning" to interlink with the sequences in "The Interrogation". Confusingly, in the end credits Young is credited as playing 'Ho Ling', a name never used in the film version.