Isizini yesikhombisa ethi "Flash" sisenkingeni egcwele, futhi endaweni yonke uBarry Allen sekunezinguquko ezinkulu. Iqembu lathi lavalezela cishe kuzo zonke izinhlobo zikaHarrison Wells (Tom Kavan), libuyele empini enkulu yejubane lakhe elidumile futhi sasindisa i-Iris (iCandace Patton) kusuka ku-Mirror Universe, kepha ngasikhathi sinye babhekana nezinkinga ezintsha.
I-Flash kufanele abhekane namabutho amasha, futhi ngaphezu kwazo zonke izithwathwa kanye ne-keitlin (uDaniel Panabaker) ayehlukaniswe, futhi owokuqala walaba kuzodingeka aphendule ezenzweni zawo ezedlule; Kepha abalandeli kumele babekezele ukuthola ukuthi izophela kanjani. Ngosuku olwandulela ukuthi uchungechunge luqhubeka ngekhefu elifushane bese libuyela kuphela ngoMeyi 4 emoyeni.
Ngo-Ephreli 20, izilaleli zizokwazi ukubuyekeza isiqephu esedlule, lapho uChester (iBrandon MCught) neTSco (Carlos Valdez) ephila kanye ngosuku ngo-1998. Ngokusho kwe-MC Hught, kuzosiza iqhawe lakhe ukuba lifunde okuningi ngabo, ngoba ngaphambili wayehlushwa yisifo se-impostor futhi ehluleka ukuthi kufana nabanye abahlanganyeli beqembu le-flash.
Ngo-Ephreli 27, izilaleli zilinde enye ephindaphindwayo, futhi ngoMeyi 4 kuphela, umbukiso uzobuya neziqephu ezintsha. Kubo, isithwathwa sizobhekana nesiphetho sabo ngemuva kokugweba enkantolo enkabeni yedolobha futhi sikhokhele wonke amacala. Cishe uzolahlekelwa amandla akhe, futhi selokhu ahlukana ne-caitlin, angakubhubhisa.