▁period ▁dep ict ing ▁the ▁Ob ser vers ▁as ▁opp ress ors ▁rather ▁than ▁as ▁pass ive ▁witness es . ▁ ▁Le ading ▁up ▁to ▁its ▁broadcast , ▁journal ists ▁noted ▁that ▁the ▁nin ete enth ▁episode ▁of ▁each ▁season ▁of ▁Fr inge ▁has ▁generally ▁been ▁its ▁" cra zi est ▁hour ", ▁and ▁anticip ated ▁that ▁" Let ters ▁of ▁Trans it " ▁would ▁be ▁similarly ▁strange . ▁The ▁Fox ▁network ▁promoted ▁the ▁episode ▁with ▁a ▁series ▁of ▁four ▁te aser ▁videos , ▁each ▁containing ▁a ▁clue ▁to ▁a ▁fifth ▁video ▁reve aling ▁the ▁special ▁opening ▁cred its ▁for ▁this ▁episode . ▁The ▁episode ▁contained ▁a ▁new ▁opening ▁credit ▁sequence ▁that ▁helped ▁set ▁the ▁tone , ▁with ▁" fr inge " ▁terms ▁including ▁community , ▁joy , ▁imagination , ▁and ▁free ▁will . ▁ ▁A ctor ▁Henry ▁Ian ▁C us ick ▁and ▁actress ▁Georg ina ▁Ha ig ▁guest ▁star red ▁in ▁the ▁episode ▁as ▁a ▁pair ▁of ▁Federal ▁agents . ▁C us ick ▁had ▁worked ▁with ▁co - cre ator ▁J . J . ▁Abr ams ▁and ▁executive ▁producer ▁P ink ner ▁on ▁the ▁ABC ▁series ▁Lost . ▁C us ick ▁stated ▁that ▁most ▁of ▁his ▁scenes ▁were ▁fil med ▁with ▁Ha ig ▁and ▁John ▁No ble ▁( W alter ▁Bishop ), ▁and ▁that ▁the ▁story ▁leaves ▁a ▁possibility ▁for ▁the ▁return ▁of ▁their ▁characters ▁in ▁the ▁future . ▁No ble ▁found ▁it ▁unusual ▁to ▁film ▁an ▁episode ▁that ▁did ▁not ▁involve ▁the ▁lead ▁actors . ▁He ▁explained , ▁" That ▁was