The Flash: "Invasion!" Review - IGN

A massive Arrow-verse crossover got underway as Barry recruited allies to battle an alien invasion.

Though technically the second chapter of The CW’s “four-night crossover event,” The Flash marked the true beginning of the big Invasion crossover tonight. As expected, there was a ton of appeal in seeing so many heroes joining forces on the small screen. But without a well-defined enemy to unify these heroes, it was often the Flashpoint-related character drama that propelled this first act.

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