The Flash Season 5 Episode 8 Review: What's Past is Prologue
While season 5, episode 7 is actually titled "O Come, All Ye Faithful," the episode titled " What's Past is Prologue " is the landmark 100th episode of the series and is officially Season 5, Episode 8 . Directed by Tom Cavanagh (who also plays multiple versions of Harrison Wells), the episode is widely praised for its nostalgic trip through the show's history. Key Review Highlights