x 0 4 ▁because ▁it ▁was ▁a ▁pay off ▁of ▁a ▁full ▁season ▁and ▁three ▁episodes ▁of ▁work . ▁You ' ve ▁been ▁lay ing ▁all ▁this ▁ground work ▁of ▁information ▁for ▁all ▁the ▁characters ▁and ▁the ▁back story . ▁The ▁actors ▁loved ▁doing ▁it ▁because ▁they ' re ▁earned ▁moments ." ▁ ▁The ▁episode ▁was ▁shot ▁in ▁V ancouver ▁during ▁the ▁summer , ▁where ▁temper atures ▁were ▁over ▁ 1 0 0 ▁degrees ▁F ahren heit . ▁Executive ▁producer ▁Jeff ▁P ink ner ▁commented ▁that ▁despite ▁the ▁heat , ▁guest ▁actor ▁Leonard ▁N imo y ▁" was ▁doing ▁pages ▁and ▁pages ▁of ▁dialog ue , ▁and ▁he ▁handled ▁it ▁like ▁a ▁pro ," ▁while ▁co - star ▁Josh ua ▁Jackson ▁j oked ▁that ▁"[ N imo y ' s ] ▁wife ▁said ▁he ▁practices ▁bio feed back , ▁so ▁he ▁knows ▁how ▁to ▁control ▁his ▁body ▁temperature ". ▁Ch app elle ▁called ▁the ▁episode ▁" in tr igu ing ▁because ▁it ' s ▁a ▁summ ation ▁of ▁everything ▁that ▁came ▁before ▁it , ▁so ▁we ' re ▁resol ving ▁a ▁lot ▁of ▁issues ▁and ▁a ▁lot ▁of ▁questions . ▁But ▁it ' s ▁also ▁a ▁spring board ▁into ▁the ▁rest ▁of ▁the ▁season ". ▁A ctor ▁John ▁No ble , ▁who ▁played ▁Walter ▁Bishop , ▁called ▁it ▁" pro bably ▁one ▁of ▁our ▁strong est ▁and ▁dens est ▁episodes " ▁because ▁it ▁" changes ▁the ▁whole ▁direction ▁of ▁the ▁show ". ▁ ▁Not ▁knowing ▁when ▁his ▁next ▁bil led ▁episode ▁would ▁be