ed ▁K ling ons , ▁but ▁Ph lo x ▁ref uses ▁to ▁assist ▁further . ▁ ▁Production ▁ ▁The ▁story line ▁in ▁" Aff lic tion " ▁answers ▁an ▁on going ▁question ▁which ▁had ▁begun ▁with ▁the ▁pilot ▁episode ▁of ▁Enter prise , ▁" Bro ken ▁Bow ". ▁In ▁The ▁Original ▁Series , ▁K ling ons ▁appeared ▁mostly ▁human , ▁with ▁no ▁applied ▁prost het ics . ▁However , ▁in ▁Star ▁Tre k : ▁The ▁Mot ion ▁Picture , ▁they ▁first ▁appeared ▁with ▁fore head ▁rid ges ▁and ▁continued ▁to ▁appear ▁this ▁way ▁through ▁the ▁remaining ▁mov ies ▁as ▁well ▁as ▁The ▁Next ▁Generation , ▁Deep ▁Space ▁N ine ▁and ▁Vo y ager . ▁The ▁D S 9 ▁episode ▁" Tri als ▁and ▁Trib ble - ations " ▁references ▁the ▁change , ▁with ▁Chief ▁O ' B rien ▁suggesting ▁that ▁K ling ons ▁had ▁been ▁gen et ically ▁modified ▁and ▁Doctor ▁Bash ir ▁assuming ▁a ▁vir al ▁mut ation ▁had ▁taken ▁place . ▁ ▁The ories ▁created ▁by ▁fans ▁included ▁the ▁idea ▁that ▁the ▁rid g eless ▁K ling ons ▁were ▁from ▁a ▁specific ▁part ▁of ▁the ▁home ▁world , ▁but ▁this ▁was ▁disc ount ed ▁when ▁three ▁rid g eless ▁K ling ons ▁from ▁The ▁Original ▁Series ▁appeared ▁with ▁rid ges ▁in ▁the ▁Deep ▁Space ▁N ine ▁episode ▁" B lo od ▁O ath ". ▁The ▁Original ▁Series ▁had ▁a ▁restricted ▁budget , ▁and ▁there ▁was ▁no ▁fund ing ▁for ▁any ▁prost h etic ▁make - up ▁for ▁the ▁K ling ons