'Arrow' casts 'ER's' Alex Kingston as Dinah Lance: Is she Black Canary?

alex-kingston-getty.jpgMajor news coming in for "Arrow" fans -- particularly if you're a follower of the DC series that The CW's show is based on. "ER" star Alex Kingston has been cast as Dinah Lance, the MIA mother of Laurel (Katie Cassidy).

Dinah abandoned her family after her daughter Sara died while cavorting with Oliver (Stephen Amell) -- but as we reported earlier this week, she's back in Starling City, and she's determined to mend ties with Laurel. We can expect to see Dinah in at least three episodes this season.

In the comic books, Dinah Lance was the original Black Canary -- a highly trained vigilante expert in Judo, acting and impersonation. In later comics, she developed a superpower: a high-pitched scream that could stun her opponents and even render them unconscious. Of course, in the "Arrow" universe, superpowers don't exist... but there's always the chance they'll give it a new twist. Dinah later passed the Black Canary torch to her daughter.

Kingston's casting was first reported by EW. In addition to her years on "ER," Kingston is known for playing River Song on "Doctor Who."
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