Do you know anything about the episode of The Flash that Katie Cassidy will be guest-starring in on May 17th? —Jill
“Like most of the Earth-Two metahumans, Black Siren is under the thumb of Zoom,” EP Todd Helbing tells me. That said, “She’s a very powerful metahuman,” EP Aaron Helbing notes. “She is sassy, strong and capable…. Katie really nailed the performanc

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