▁the ▁polym orph ▁attacks ▁the ▁others , ▁dra ining ▁them ▁each ▁of ▁a ▁character ▁trait ▁and ▁morph ing ▁them ▁into ▁an ▁alternate ▁persona ▁– ▁Cat ▁los es ▁his ▁cool ▁and ▁morph s ▁into ▁Du ane ▁D ib ble y , ▁while ▁R immer ▁los es ▁his ▁bit tern ess ▁and ▁becomes ▁A ce ▁R immer . ▁When ▁the ▁others ▁are ▁tra pped ▁by ▁R immer ▁in ▁the ▁cargo ▁hold ▁and ▁learn ▁that ▁he ▁is ▁prepar ing ▁to ▁sacrifice ▁himself ▁and ▁Cat ▁to ▁get ▁rid ▁of ▁the ▁polym orph ▁via ▁an ▁air lock , ▁L ister ▁and ▁K ry ten ▁break ▁free ▁and ▁conv ince ▁him ▁to ▁track ▁down ▁the ▁creature ▁and ▁free ze ▁it . ▁R immer ▁agre es , ▁where up on ▁the ▁group ▁successfully ▁neutral ize ▁the ▁polym orph . ▁R immer ▁polit ely ▁asks ▁that ▁he ▁sp ends ▁a ▁few ▁days ▁as ▁A ce ▁before ▁he ▁is ▁changed ▁back , ▁while ▁Cat ▁asks ▁to ▁be ▁changed ▁back ▁immediately ▁fear ing ▁his ▁persona ' s ▁cl ums iness ; ▁his ▁fear s ▁are ▁just ified ▁when ▁he ▁accident ally ▁free zes ▁the ▁others ▁a ▁few ▁seconds ▁later . ▁ ▁Production ▁ ▁Both ▁the ▁characters ▁A ce ▁R immer ▁and ▁Du ane ▁D ib ble y ▁were ▁huge ▁fan ▁favour ites , ▁as ▁was ▁the ▁Red ▁D war f ▁III ▁episode ▁" Pol ym orph ", ▁and ▁the ▁writers ▁cr ammed ▁in ▁a ▁sequ el ▁to ▁all ▁these ▁aspects ▁with ▁" Em oh awk : ▁Pol ym orph ▁II ". ▁The ▁title