Arrow “Missing” Official Photos: Black Siren is BACK!

Katie Cassidy is back as the Black Siren in the May 17 episode of Arrow, and we’ve got some pictures from the episode, which is called “Missing!”

She’s not the only one who is back, either: John Barrowman makes an appearance as Malcolm Merlyn, as well, back from tormenting the Legends of Tomorrow with his pals in the Legion of Doom!

You can find the gallery, which also includes some celebrations and even an Olicity moment, below; but first, a description:

BLACK SIREN RETURNS — Black Siren (guest star Katie Cassidy) returns to help Chase (Josh Segarra). Felicity (Emily Bett Rickards) organizes a birthday party for Oliver (Stephen Amell) while Lance (Paul Blackthorne) is furious after Rene (Rick Gonzalez) misses the custody hearing for his daughter. Mairzee Almas directed the episode written by Speed Weed & Oscar Balderrama (#522). Original airdate 5/17/2017.

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Arrow -- "Missing" -- Image AR522b_0112b.jpg -- Pictured (L-R): Willa Holland as Thea Queen / Speedy and Paul Blackthorne as Quentin Lance -- Photo: Katie Yu/The CW -- © 2017 The CW Network, LLC. All Rights Reserved.