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: "The Girl With The Red Lightning" , focusing on Team Flash's battle against Cicada II.

Reviewers and fans often highlight this episode for its relentless tension and the beginning of the "endgame" for Season 5: Watch 24 - 5x21 1

: Jack manages to seize the recording and narrowly escapes the plane before it is intercepted. Critical Analysis and Fan Reception : "The Girl With The Red Lightning" ,

: "The Opposite" , widely considered one of the show's best episodes. Watch 24 - 5x21 1