▁after ▁arriv ing ▁in ▁the ▁Great ▁Valley , ▁and ▁Little foot ▁id ol izes ▁him ▁there after ▁as ▁the ▁legend ary ▁" L one ▁Din osa ur ", ▁who ▁pur port edly ▁saved ▁the ▁Great ▁Valley ▁from ▁a ▁particularly ▁powerful ▁Sh ar pt ooth ▁long ▁before ; ▁Doc ' s ▁own ▁statements ▁about ▁having ▁visited ▁the ▁Great ▁Valley ▁before , ▁as ▁well ▁as ▁a ▁large ▁scar ▁on ▁his ▁face ▁res emb ling ▁one ▁of ▁the ▁legend , ▁support ▁Little foot ' s ▁ideas . ▁At ▁the ▁end ▁of ▁the ▁film , ▁after ▁Doc ▁and ▁Grand pa ▁Long ne ck ▁defeat ▁two ▁mar aud ing ▁din osa urs ▁together , ▁Doc ▁leaves ▁the ▁Valley . ▁He ▁appears ▁again ▁in ▁the ▁TV ▁episode ▁" The ▁L one ▁Din osa ur ▁Returns ," ▁in ▁which ▁he ▁now ▁has ▁a ▁lady - friend . ▁During ▁the ▁episode , ▁he ▁is ▁initially ▁app alled ▁by ▁Little foot ' s ▁friendship ▁with ▁Ch om per , ▁but ▁is ▁gradually ▁convinced ▁to ▁respect ▁the ▁latter . ▁ ▁Support ing ▁characters ▁ ▁Grand pa ▁and ▁Grand ma ▁Long ne ck ▁Grand pa ▁Long ne ck , ▁vo iced ▁by ▁Bill ▁Er win ▁( I ) ▁and ▁Kenneth ▁Mars ▁( II ▁– ▁XII , ▁TV ▁series ) ▁and ▁Barry ▁B ost wick ▁( X IV ), ▁and ▁Grand ma ▁Long ne ck , ▁vo iced ▁by ▁L inda ▁Gary ▁( II ▁– ▁IV ) ▁and ▁Mi ri am ▁F lyn n ▁( V ▁– ▁XIV , ▁TV ▁series ), ▁are ▁two ▁older