' s ▁young est ▁son ▁Tro ilus ▁vis its ▁V icki . ▁She ▁persu ades ▁him ▁to ▁try ▁to ▁get ▁them ▁released , ▁and ▁it ▁is ▁clear ▁the ▁two ▁are ▁falling ▁in ▁love . ▁ ▁The ▁Doctor ▁propos es ▁to ▁Od ys se us ▁a ▁great ▁r use : ▁the ▁Gree ks ▁will ▁pret end ▁to ▁sail ▁away , ▁leaving ▁a ▁wooden ▁horse ▁behind ▁outside ▁T roy , ▁as ▁a ▁t ribute ▁and ▁acknowled g ement ▁of ▁defeat , ▁hoping ▁the ▁Tro j ans ▁will ▁take ▁it ▁inside ▁the ▁city ▁without ▁real ising ▁it ▁is ▁actually ▁h ollow ▁and ▁filled ▁with ▁Greek ▁soldiers . ▁Ag am em non ▁appro ves , ▁but ▁only ▁provided ▁the ▁Doctor ▁is ▁among ▁those ▁inside ▁the ▁horse . ▁The ▁horse ▁is ▁sp otted ▁by ▁the ▁Tro j ans , ▁who ▁rejo ice ▁at ▁the ▁Greek ▁army ' s ▁apparent ▁retre at . ▁Pri am ▁has ▁V icki ▁released . ▁Paris ▁brings ▁the ▁horse ▁into ▁the ▁city . ▁V icki ▁fre es ▁Steven , ▁who ▁ur ges ▁her ▁to ▁conv ince ▁Tro ilus ▁to ▁leave ▁T roy . ▁She ▁tells ▁Tro ilus ▁that ▁Di om edes ▁has ▁escaped . ▁Tro ilus ▁leaves ▁T roy ▁to ▁search ▁for ▁him , ▁but ▁enc oun ters ▁Ach illes , ▁whom ▁he ▁k ills ▁to ▁a ven ge ▁H ector . ▁ ▁At ▁night fall , ▁the ▁Gree ks ▁and ▁the ▁Doctor ▁leave ▁the ▁horse ▁and ▁open ▁the ▁city ▁gates . ▁The ▁Greek ▁army ▁enters ▁and ▁so ▁begins ▁the ▁down fall ▁of ▁T