The Arrowverse Crossover Ends With a Heartbreaking Death

[Warning: This post contains spoilers from Part 4 of the Arrowverse crossover event, "Crisis on Earth-X." Read at your own risk.]

With every victory comes loss, and the final chapter in this year's four-way crossover, "Crisis on Earth-X," came with a huge one: Professor Martin Stein (Victor Garber).

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• The Flash
• DC's Legends of Tomorrow
• Arrow
• Supergirl

Source TVGuide.com: Breaking News http://ift.tt/2zyzMv4