▁Sim ms . ▁The ▁character ▁was ▁originally ▁to ▁have ▁been ▁played ▁by ▁John ▁Daw son , ▁who ▁hurt ▁his ▁back ▁lif ting ▁an ▁actress ▁during ▁re he ars als ▁for ▁" The ▁S weet ▁Sm ell ▁of ▁Dis aster " ▁and ▁was ▁unable ▁to ▁continue ; ▁the ▁part ▁was ▁rec ast , ▁going ▁instead ▁to ▁Jack ▁May . ▁In ▁terms ▁of ▁fashion , ▁the ▁series ▁captured ▁well ▁the ▁grad ual ▁shift ▁in ▁ 1 9 6 6 / 6 7 ▁from ▁the ▁" mod " ▁styles ▁of ▁" Sw ing ing ▁London " ▁to ▁the ▁more ▁Boh em ian ▁( event ually ▁hi pp ie ) ▁styles ▁that ▁character ised ▁the ▁late ▁si xt ies . ▁Adam ▁has ▁his ▁ 1 0 0 th ▁birth day ▁in ▁the ▁final ▁episode , ▁" A ▁Sin ister ▁Sort ▁of ▁Service ", ▁and ▁gets ▁a ▁tele gram ▁from ▁the ▁Queen ▁( a ▁UK ▁custom ▁for ▁people ▁who ▁have ▁reached ▁that ▁age ), ▁as ▁well ▁as ▁a ▁birth day ▁c ake ▁bearing ▁one ▁hundred ▁cand les . ▁ ▁The ▁opening ▁episode ▁of ▁Series ▁ 2 , ▁" A ▁S light ▁Case ▁of ▁Re inc arn ation ", ▁apparently ▁set ▁in ▁ 1 9 0 2 , ▁rem ind ed ▁view ers ▁of ▁the ▁Face , ▁who ▁had ▁not ▁been ▁seen ▁since ▁" A ▁V int age ▁Year ▁for ▁Sc ound rel s "; ▁his ▁re app earance ▁in ▁the ▁present ▁day ▁being ▁explained ▁in ▁the ▁next ▁episode ▁" Black ▁E cho " ▁by ▁his ▁having ▁fro zen