▁Mik h ail ▁Simon ov ▁and ▁he ▁served ▁as ▁one ▁of ▁the ▁Soviet ▁Army ' s ▁liquid ators ▁during ▁the ▁Ch ern ob yl ▁dis aster ). ▁In ▁addition , ▁" Host s , ▁Part ▁ 2 " ▁expanded ▁upon ▁the ▁back story ▁of ▁the ▁Fl uk eman , ▁reve aling ▁that ▁he ▁was ▁a ▁Soviet ▁liquid ator ▁named ▁Gregory , ▁who , ▁after ▁being ▁locked ▁in ▁a ▁se wer age ▁tank er ▁tr uck ▁in ▁Ch ern ob yl , ▁mut ated ▁into ▁the ▁original ▁Fl uk eman ▁after ▁he ▁was ▁exposed ▁to ▁ir rad i ated ▁cool ing ▁water ▁from ▁the ▁still - burn ing ▁Re actor ▁No . ▁ 4 ▁and ▁to ▁flat w orm s ▁in ▁the ▁se wer age ▁tank . ▁ ▁Production ▁ ▁Writing ▁Chris ▁Carter ▁claimed ▁to ▁have ▁been ▁inspired ▁to ▁write ▁the ▁episode ▁after ▁his ▁dog ▁had ▁w orm s , ▁a ▁situation ▁he ▁called ▁" very ▁dis g ust ing ". ▁He ▁also ▁had ▁been ▁reading ▁about ▁the ▁Ch ern ob yl ▁dis aster ▁and ▁the ▁ext inction ▁of ▁species ▁at ▁the ▁time ▁and ▁bl ended ▁all ▁three ▁of ▁these ▁concepts ▁when ▁writing ▁the ▁episode . ▁Carter ▁described ▁his ▁m ood ▁while ▁writing ▁the ▁episode , ▁" I ▁was ▁in ▁a ▁fun k ▁when ▁I ▁wrote ▁that ▁episode . ▁We ▁were ▁coming ▁back ▁from ▁hi atus ▁and ▁I ▁was ▁trying ▁to ▁find ▁something ▁more ▁interesting ▁than ▁just ▁the ▁Fl uk eman . ▁I ▁was ▁ir rit ated ▁at ▁the ▁time ▁and ▁I ▁brought ▁my