▁John ▁Steph enson ▁as ▁Mr . ▁P ee v ly , ▁the ▁ir rit able , ▁fr ustr ated ▁and ▁author itar ian ▁zoo keeper ▁at ▁Wonder land ▁Z oo ▁who ▁the ▁three ▁be ars ▁constantly ▁try ▁to ▁out sm art . ▁ ▁Joe ▁E . ▁Ross ▁as ▁Lion el ▁Bot ch , ▁the ▁" h are bra ined ▁assistant " ▁to ▁Mr . ▁P ee v ly . ▁He ▁is ▁constantly ▁comple ting ▁work ▁for ▁Mr . ▁P ee v ly , ▁despite ▁him ▁putting ▁Lion el ▁" in ▁dangerous ▁situations ▁for ▁self ish ▁reasons ". ▁ ▁Production ▁and ▁promotion ▁ ▁Exec ut ively ▁produced ▁and ▁directed ▁by ▁William ▁H anna ▁and ▁Joseph ▁Bar ber a ' s ▁H anna - Bar ber a ▁Produ ctions , ▁Charles ▁A . ▁Nich ols ▁served ▁as ▁the ▁series ' ▁main ▁producer . ▁Additionally , ▁Robert ▁" Bob " ▁G iv ens ▁contributed ▁as ▁the ▁layout ▁artist ▁for ▁the ▁story boards . ▁The ▁show ' s ▁official ▁theme ▁song ▁was ▁written ▁by ▁Ho yt ▁Curt in , ▁who ▁also ▁served ▁as ▁the ▁series ' ▁music ▁composer . ▁Other ▁than ▁the ▁main ▁cast , ▁frequent ▁H anna - Bar ber a ▁voice ▁actors ▁Jan et ▁Wal do , ▁Joan ▁Ger ber , ▁L enn ie ▁Wein rib , ▁Hal ▁Smith ▁and ▁Vic ▁Per rin ▁played ▁several ▁minor ▁characters ▁for ▁the ▁show . ▁A ▁group ▁of ▁five ▁writers ▁wrote ▁for ▁Help !... ▁It ' s ▁the ▁H air ▁Bear ▁B unch !, ▁including ▁Jo el ▁K ane