▁Top ▁Dog ▁and ▁drug ▁deal er , ▁serving ▁life ▁for ▁murder . ▁ ▁Series ▁ 2 ▁( 2 0 0 0 ) ▁ ▁Nik ki ▁and ▁Helen ' s ▁relationship ▁deep ens ▁with ▁Helen ▁res ign ing ▁from ▁the ▁Wing ▁Governor ' s ▁post ▁and ▁working ▁as ▁a ▁new ▁l ia ison ▁officer ▁for ▁prisoners ▁sent enced ▁to ▁life ▁imprison ment , ▁encourag ing ▁Nik ki ▁to ▁continue ▁her ▁education ▁and ▁appeal ▁against ▁her ▁sentence . ▁Sh ell ' s ▁background ▁was ▁exam ined ▁in ▁some ▁detail , ▁with ▁h arrow ing ▁scenes ▁describing ▁child hood ▁ab use . ▁Z andra ' s ▁trag ic ▁story ▁finally ▁comes ▁to ▁a ▁close ▁when ▁she ▁dies ▁from ▁a ▁brain ▁tum our . ▁For ▁light ▁relief , ▁Y v onne ▁At kins ▁( L inda ▁Henry ), ▁the ▁gang ster ' s ▁m oll , ▁set ▁up ▁" B ab es ▁Be hind ▁B ars ", ▁a ▁sex - hot line ▁staff ed ▁by ▁the ▁prisoners ▁with ▁sm ugg led ▁in ▁mobile ▁ph ones , ▁playing ▁such ▁characters ▁as ▁" W hi pl ash ▁W anda ", ▁" S au cy ▁Son ia " ▁and ▁" V icky ▁the ▁Virgin ▁B ride ". ▁Series ▁two ▁ended ▁on ▁a ▁double ▁cl iff h anger , ▁with ▁Nik ki ▁esc aping ▁from ▁L ark hall ▁to ▁be ▁with ▁Helen , ▁leaving ▁Helen ▁to ▁ag on ise ▁over ▁whether ▁to ▁contact ▁the ▁police , ▁and ▁Sh ell ▁l uring ▁Fen ner ▁to ▁her ▁cell ▁for ▁sex , ▁where ▁she