▁carbon ▁dio x ide ▁in ▁the ▁atmosphere ▁that ▁will ▁eventually ▁kill ▁her ▁without ▁regular ▁dos es ▁of ▁" tri ox " ▁medic ation , ▁which ▁she ▁is ▁running ▁out ▁of . ▁Dr . ▁Bash ir ▁( Alex ander ▁S idd ig ) ▁tells ▁her ▁to ▁cut ▁her ▁do se ▁such ▁that ▁she ▁will ▁surv ive ▁the ▁six ▁days ▁that ▁it ▁will ▁take ▁the ▁Def i ant ▁to ▁reach ▁the ▁planet . ▁In ▁turn , ▁Captain ▁C us ak ▁asks ▁that ▁they ▁keep ▁a ▁constant ▁conversation ▁going ▁with ▁her ▁to ▁keep ▁her ▁alert ▁and ▁to ▁make ▁her ▁feel ▁less ▁isolated . ▁ ▁As ▁they ▁travel , ▁each ▁of ▁the ▁crew ▁becomes ▁closer ▁to ▁Captain ▁C us ak ▁as ▁they ▁discuss ▁their ▁own ▁personal ▁problems ▁with ▁her . ▁When ▁Dr . ▁Bash ir ▁disco vers ▁that ▁C us ak ' s ▁supply ▁of ▁tri ox ▁is ▁more ▁critical ▁than ▁they ▁thought , ▁Captain ▁S isko ▁( A very ▁Bro oks ) ▁orders ▁the ▁ph aser ▁bank ▁power ▁to ▁be ▁rout ed ▁to ▁struct ural ▁stability ▁controls ▁to ▁increase ▁the ▁Def i ant ''' s ▁speed . ▁They ▁arrive ▁at ▁the ▁planet ▁shortly ▁after ▁C us ak ▁has ▁fallen ▁un cons cious , ▁giving ▁them ▁a ▁limited ▁amount ▁of ▁time ▁to ▁find ▁her . ▁After ▁fig uring ▁out ▁how ▁to ▁by pass ▁a ▁strange ▁energy ▁field ▁that ▁surr ounds ▁the ▁planet ▁with ▁a ▁sh utt le craft , ▁the ▁crew ▁finds ▁the ▁long - de com posed ▁remains ▁of ▁a ▁woman ' s ▁body ▁deep ▁in