. ▁ 9 ▁features ▁new ▁characters , ▁the ▁writers ▁were ▁able ▁to ▁attract ▁actors ▁who ▁might ▁have ▁been ▁unw illing ▁to ▁commit ▁to ▁an ▁entire ▁series . ▁" The ▁ 1 2 ▁Days ▁of ▁Christ ine " ▁star red ▁Smith ▁as ▁Christ ine , ▁around ▁whom ▁the ▁story ▁revol ves . ▁Adam , ▁Christ ine ' s ▁partner , ▁was ▁played ▁by ▁Tom ▁R iley , ▁and ▁St acy ▁Li u ▁played ▁F ung , ▁Christ ine ' s ▁ro omm ate . ▁Christ ine ' s ▁parents — Mar ion ▁and ▁Er nie — w ere ▁played ▁by ▁M iche le ▁D ot rice ▁and ▁Paul ▁C ople y , ▁while ▁Christ ine ' s ▁son ▁Jack ▁was ▁played ▁by ▁Jo el ▁Little ▁and ▁D ex ter ▁Little . ▁Christ ine ' s ▁colle ague ▁Bobby ▁was ▁played ▁by ▁P ember ton , ▁and ▁Adam ' s ▁colle ague ▁Z ara ▁was ▁played ▁by ▁Jess ica ▁Ell er by . ▁She ars m ith ▁plays ▁the ▁Str anger , ▁a ▁myster ious ▁man ▁who ▁repeatedly ▁appears ▁to ▁Christ ine . ▁For ▁the ▁second ▁series ▁on ▁Inside ▁No . ▁ 9 , ▁P ember ton ▁and ▁She ars m ith ▁were ▁permitted ▁to ▁build ▁two ▁sets ; ▁the ▁first ▁was ▁for ▁" La ▁C ouch ette ", ▁the ▁first ▁episode ▁of ▁the ▁series , ▁and ▁the ▁second ▁was ▁for ▁" The ▁ 1 2 ▁Days ▁of ▁Christ ine ". ▁The ▁two ▁were ▁built ▁alongside ▁each ▁other ▁at ▁T wick en ham ▁Studios .