▁and ▁ret con ned ▁it ▁into ▁later ▁series ▁in ▁the ▁franch ise . ▁ ▁Ret con ning ▁is ▁also ▁generally ▁distinct ▁from ▁replacing ▁the ▁actor ▁who ▁plays ▁a ▁part ▁in ▁an ▁on going ▁series , ▁which ▁is ▁more ▁commonly ▁an ▁example ▁of ▁loose ▁continu ity ▁rather ▁than ▁retro act ively ▁changing ▁past ▁continu ity . ▁The ▁different ▁appearance ▁of ▁the ▁character ▁is ▁either ▁ignored ▁( as ▁was ▁done ▁with ▁the ▁characters ▁of ▁D arr in ▁Steph ens ▁and ▁Glad ys ▁K rav itz ▁on ▁the ▁television ▁series ▁Bew itch ed ) ▁or ▁explained ▁within ▁the ▁series , ▁such ▁as ▁with ▁" reg ener ation " ▁in ▁Doctor ▁Who , ▁or ▁the ▁Oracle ▁in ▁The ▁Matrix ▁Revolution s . ▁Sometimes , ▁there ▁are ▁refer ential , ▁inside ▁j okes ▁on ▁actor ▁changes ▁in ▁the ▁show , ▁such ▁as ▁with ▁My ▁W ife ▁& ▁K ids ▁and ▁Rose anne , ▁where ▁there ▁was ▁a ▁change ▁of ▁actress es ▁playing ▁a ▁role ▁( char acters ▁Cla ire ▁K yle ▁and ▁Beck y ▁Con ner , ▁respectively ). ▁In ▁the ▁latter , ▁another ▁character ▁obser ves ▁that ▁children ▁can ▁change ▁as ▁they ▁reach ▁ad ul th ood , ▁remark ing ▁that ▁when ▁Beck y ▁came ▁back ▁from ▁college ▁( play ed ▁by ▁a ▁new ▁actress ), ▁they ▁could ▁not ▁even ▁recognize ▁her . ▁When ▁the ▁actor ▁playing ▁R ory ▁was ▁replaced ▁in ▁Mrs ▁Brown ' s ▁Boys , ▁the ▁new ▁actor ▁first ▁appeared ▁on ▁set ▁band aged ▁up , ▁supposed ly ▁following ▁cos met ic ▁surg ery