River Song and Jack Harkness to meet (maybe) on 'Arrow'

Want to meet Laurel Lance’s missing mother?

Former ER series regular Alex Kingston is joining The CW’s breakout superhero drama Arrow in a recurring guest star role. The British actress will play Dinah Lance — Laurel’s (Katie Cassidy) mom and Detective Quentin’s (Paul Blackthorne) ex-wife. Later this season Dinah will return to Starling City to make amends with her family that she abandoned years earlier following the tragic death of her daughter aboard Oliver Queen’s (Stephen Amell) yacht.

In addition to her years on ER, Kingston recently earned some serious geek cred in a recurring role on the BBC’s Doctor Who playing River Song — so now Arrow has nabbed both Capt. Jack (John Barrowman) and River from that ‘verse.

Arrow returned to Wednesday nights last week after its winter break to deliver a ratings gain, which is always great to see.

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Major 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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