our , ▁where ▁the ▁character ▁Super ▁Dave ▁was ▁first ▁introduced . ▁That ▁same ▁year , ▁he ▁had ▁a ▁came o ▁appearance ▁in ▁What ' s ▁Up , ▁Doc ? ▁In ▁the ▁mid - 1 9 7 0 s , ▁he ▁guest ▁star red ▁in ▁two ▁episodes ▁of ▁The ▁O dd ▁Cou ple . ▁▁ ▁B yn er ▁played ▁a ▁com ed ian / imp erson ator ▁ab o ard ▁a ▁cru ise ▁ship ▁in ▁season ▁ 6 ▁of ▁Hawai i ▁Five - O . ▁His ▁character , ▁D uff y ▁Mal one , ▁did ▁imp erson ations ▁of ▁John ▁Wayne ▁and ▁then ▁got ▁hit ▁on ▁the ▁back ▁of ▁his ▁head ▁as ▁a ▁di version ary ▁t actic ▁by ▁the ▁bad ▁gu y . ▁He ▁had ▁a ▁rec urr ing ▁role ▁in ▁the ▁situation ▁comedy ▁The ▁Pract ice ▁during ▁its ▁first ▁season ▁in ▁ 1 9 7 6 . ▁ ▁In ▁the ▁late ▁ 1 9 7 0 s , ▁he ▁had ▁a ▁featured ▁role ▁as ▁Det ect ive ▁Don ah ue ▁on ▁the ▁TV ▁series ▁So ap . ▁He ▁was ▁cast ▁in ▁Happy ▁Days ▁as ▁M ork ▁from ▁Or k ▁but ▁found ▁the ▁prem ise ▁rid icul ous , ▁so ▁he ▁decl ined ▁the ▁role ▁days ▁before ▁film ing ▁began . ▁Robin ▁Williams ▁was ▁called ▁in ▁at ▁the ▁last ▁minute , ▁and ▁that ▁substitution ▁proved ▁to ▁be ▁a ▁career - making ▁part ▁for ▁the ▁com ed ian ▁who ▁deeply ▁im pressed ▁everyone ▁with ▁his ▁talent . ▁ ▁In ▁the ▁ 1 9 7