' s ▁father ▁and ▁head ▁of ▁the ▁household . ▁He ▁own s ▁P ry or ' s ▁TV ▁and ▁Radio ▁Store . ▁Later ▁represented ▁his ▁district ▁on ▁the ▁Philadelphia ▁City ▁Council . ▁ ▁G ail ▁O ' Gr ady ▁as ▁Helen ▁P ry or : ▁Jack ' s ▁wife . ▁St ay - at - home ▁mom ▁who ▁later ▁works ▁for ▁a ▁travel ▁ag ency . ▁ ▁Will ▁Est es ▁as ▁John ▁J . ▁" J J " ▁P ry or ▁Jr .: ▁The ▁oldest ▁P ry or ▁child . ▁He ▁en lists ▁in ▁the ▁United ▁States ▁Marine ▁Corps ▁and ▁f ights ▁in ▁the ▁Vietnam ▁War . ▁ ▁Sarah ▁Ram os ▁as ▁Pat ric ia ▁" Pat ty " ▁P ry or : ▁Meg ' s ▁younger ▁sister . ▁ ▁Very ▁book ▁smart ▁and ▁acts ▁like ▁a ▁know ▁it ▁all . ▁ ▁Eth an ▁D ampf ▁as ▁William ▁" Will " ▁P ry or : ▁The ▁young est ▁P ry or ▁child ▁whose ▁leg ▁was ▁cri pp led ▁with ▁pol io , ▁which ▁is ▁a ▁source ▁of ▁gu ilt ▁for ▁his ▁parents ▁as ▁they ▁refused ▁to ▁allow ▁him ▁to ▁have ▁the ▁S alk ▁v acc ine . ▁In ▁the ▁show ' s ▁second ▁season , ▁his ▁leg ▁was ▁surg ically ▁rep a ired . ▁ ▁Jonathan ▁Adams ▁as ▁Henry ▁Walker : ▁An ▁African ▁American ▁employee ▁in ▁Jack ' s ▁store ▁who ▁later ▁became ▁a ▁partner ▁in ▁the ▁store , ▁who ▁also ▁heads ▁a ▁family . ▁ ▁Ar len ▁Esc arp eta ▁as ▁Samuel