 " Ice " features two elements common to other works by Morgan and Wong : dual identities and the questioning of one 's personality . In her essay " Last Night We Had an Omen " , Leslie Jones noted this thematic leitmotif in several of their other X @-@ Files scripts : " the meek animal @-@ control inspector who is a mutant shape @-@ shifter with a taste for human liver [ " Squeeze " ] , the hapless residents of rural Pennsylvania driven mad by a combination of insecticides and electronic equipment [ " Blood " ] , [ and ] the uptight PTA run by practicing Satanists [ " Die Hand Die Verletzt " ] " . 
