Ph antom ▁Pi per ", ▁a ▁figure ▁said ▁to ▁appear ▁to ▁a ▁McC rim mon ▁before ▁death . ▁While ▁att ending ▁to ▁Jam ie , ▁Pol ly ▁sees ▁a ▁large ▁figure ▁leave ▁through ▁the ▁door . ▁When ▁Hob son , ▁the ▁Doctor , ▁Ben , ▁John ▁and ▁N ils ▁arrive ▁to ▁collect ▁Evans ' ▁body , ▁it ▁has ▁disappeared . ▁They ▁then ▁leave ▁to ▁investigate ▁where ▁this ▁' pi per ' ▁is . ▁Pol ly ▁goes ▁to ▁get ▁water , ▁and ▁Jam ie ▁w akes ▁up ▁to ▁see ▁the ▁' pi per ' ▁adv ancing ▁on ▁him . ▁ ▁The ▁' pi per ' ▁ign ores ▁Jam ie , ▁as ▁he ▁doesn ' t ▁have ▁the ▁disease , ▁so ▁he ▁ste als ▁another ▁patient ▁and ▁leaves . ▁Pol ly ▁comes ▁back ▁in ▁just ▁as ▁the ▁figure ▁is ▁leaving ▁and ▁recogn ises ▁it ▁as ▁a ▁Cy ber man , ▁and ▁the ▁Doctor ▁real ises ▁their ▁old ▁enemies ▁are ▁taking ▁the ▁patients ' ▁bodies . ▁Hob son ▁br ush es ▁away ▁the ▁cy ber - story , ▁bel ieving ▁they ▁died ▁out ▁years ▁ago . ▁He ▁gives ▁the ▁Doctor ▁ 2 4 ▁hours ▁to ▁discover ▁the ▁cause ▁of ▁the ▁virus , ▁or ▁else ▁he ▁and ▁his ▁compan ions ▁must ▁leave . ▁ ▁While ▁Hob son ▁de als ▁with ▁the ▁Gra v it ron , ▁which ▁is ▁becoming ▁difficult ▁to ▁control ▁with ▁fewer ▁staff , ▁the ▁Doctor ▁focus es ▁on ▁the ▁cause ▁of ▁the ▁vir al ▁disease . ▁In ▁the ▁sick bay , ▁Pol ly ▁and