He also did not want the series to feature ballad music typical of The WB network, and forced the use of classic rock for the soundtrack by writing the music into the script.[1] For the episode's villain, Kripke used the well-known urban legend of the vanishing hitchhiker, but combined it with the Mexican legend of La Llorona to give the spirit more motivation and characterization.[18] The ghost was younger in an earlier version of script, and murdered her parents instead of her children; this was revised to allow for the casting of an older actress.[11]