▁and ▁board ▁the ▁g lee ▁club ' s ▁bus ▁to ▁National s . ▁ ▁Production ▁This ▁episode ▁was ▁written ▁by ▁G lee ▁co - cre ator ▁Ian ▁B ren nan , ▁who ▁also ▁made ▁his ▁director ial ▁debut ▁in ▁this ▁episode . ▁While ▁the ▁first ▁scenes ▁for ▁the ▁episode ▁were ▁shot ▁on ▁March ▁ 3 0 , ▁ 2 0 1 2 , ▁on ▁a ▁day ▁that ▁also ▁saw ▁scenes ▁shot ▁for ▁the ▁previous ▁two ▁episodes , ▁shooting ▁on ▁the ▁episode ▁began ▁in ▁earnest ▁on ▁Monday , ▁April ▁ 9 , ▁ 2 0 1 2 , ▁after ▁the ▁completion ▁of ▁the ▁prior ▁episode ▁at ▁the ▁end ▁of ▁the ▁week ▁before . ▁Fil ming ▁continued ▁into ▁the ▁following ▁week ▁at ▁least ▁through ▁Wed nes day , ▁April ▁ 1 8 , ▁ 2 0 1 2 , ▁by ▁which ▁point ▁the ▁next ▁episode ▁had ▁begun ▁shooting ▁in ▁parallel . ▁ ▁The ▁plot ▁has ▁T ina ▁suffering ▁a ▁" m ild " ▁head ▁injury — she ▁falls ▁into ▁a ▁f ount ain — that ▁causes ▁her ▁to ▁see ▁an ▁alternate ▁reality ▁version ▁of ▁New ▁Dire ctions : ▁actors ▁playing ▁club ▁members ▁had ▁to ▁swap ▁roles ▁with ▁another ▁actor ▁in ▁the ▁cast . ▁Chris ▁Col fer , ▁who ▁normally ▁plays ▁Kurt ▁Hum mel , ▁said ▁that ▁the ▁port ray als ▁" w ere ▁really ▁hard ▁to ▁n ail — they ' re ▁not ▁over ▁the ▁top ▁by ▁any ▁means ". ▁P airs ▁who ▁are ▁sw apping ▁roles ▁include ▁T ina ▁and ▁Rach el , ▁Kurt