Katie Cassidy returns to Arrow as Black Siren, the Earth 2 version of her former character. She will be appear in the final two episodes of this season’s Arrow. She returns at a series regular for Season Six.
Cassidy was a series regular up since the beginning of season One if Arrow. Larel Lance was the original love interest for Olie. Her character was killed last season (season four). Cassidy returned this season as her Earth 2 double while pretending to be Earth One’s Lance returned from the dead.
(Via Nuke the Fridge)
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