Tonight's Best TV

A Daily Guide to Notable Shows by Ray Rahman

8-9PM The CW

The Flash

There's a reason the fist hour of the highly anticipated crossover is titled ''Flash vs. Arrow'': The two heroes (Grant Gustin and Stephen Amell, respectively) go toe-to-toe after villain Roy G. Bivolo causes Flash's emotions to go haywire. ''Somebody in the Arrow universe gets fairly badly hurt,'' EP Andrew Kreisberg says of the two-night event. But it won't all be doom and gloom. EP Marc Guggenheim reveals that in the second hour, the Flash team will be ''tasked with helping fid Canary's killer.'' — Natalie Abrams


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