▁Mc Wh ir ter . ▁It ▁first ▁a ired ▁on ▁The ▁C W ▁on ▁October ▁ 9 , ▁ 2 0 1 8 . ▁ ▁This ▁episode ▁marks ▁the ▁first ▁appearance ▁of ▁Jess ica ▁Parker ▁Kennedy ▁as ▁N ora ▁West - All en ▁as ▁a ▁main ▁character ▁after ▁making ▁numerous ▁came os ▁last ▁season . ▁ ▁Plot ▁▁ ▁Team ▁Flash ▁meet ▁N ora , ▁Barry ▁and ▁I ris ' ▁daughter ▁from ▁the ▁future . ▁While ▁I ris ▁express es ▁excitement , ▁Barry ▁is ▁concerned ▁that ▁she ▁could ▁alter ▁the ▁tim eline ▁based ▁on ▁his ▁own ▁mistakes ▁with ▁time ▁travel . ▁The ▁Team ▁enc oun ters ▁a ▁new ▁met ah uman , ▁Grid lock , ▁who ▁is ▁able ▁to ▁har ness ▁kin etic ▁energy , ▁and ▁Barry ▁su its ▁up ▁in ▁previous ▁cost umes ▁since ▁his ▁last ▁one ▁was ▁destroyed . ▁When ▁Barry ▁tries ▁to ▁send ▁N ora ▁home , ▁W ally ▁reve als ▁that ▁N ora ' s ▁blood ▁is ▁s atur ated ▁with ▁negative ▁t ach y ons , ▁which ▁prevents ▁her ▁from ▁using ▁the ▁Speed ▁Force ▁or ▁the ▁Leg ends ' ▁W aver ider ▁to ▁time ▁travel . ▁Barry ▁asks ▁N ora ▁what ▁happens ▁to ▁him ▁in ▁the ▁future , ▁with ▁N ora ▁reve aling ▁that ▁he ▁never ▁returns ▁after ▁disappear ing ▁in ▁ 2 0 2 4 ▁and ▁that ▁she ▁tra ve led ▁back ▁in ▁time ▁to ▁meet ▁him . ▁Grid lock ▁causes ▁a ▁plane ▁to ▁fall , ▁so ▁Barry , ▁N ora , ▁W ally , ▁and ▁C is