sentences:  Charno's initial script revolved around "the concept of 50 year old murders and the transfer of genetic memory" before she expanded the premise, incorporating elements of another story idea revolving around a female serial killer.Glen Morgan and James Wong, who had written for "The X-Files" before, helped Charno refine the story, and the script was revised shortly before shooting, which resulted in newer scenes being added during production, such as the scene in which BJ attacks Mulder.During the casting process, Morgan and Wong suggested that the show use Morgan Woodward, who had previously worked with them on the Fox series "21 Jump Street".