Entertainment Weekly report that Kingston will play a recurring role on The CW series. Kingston will play Dinah Lance, the mother of Laurel (Katie Cassidy) and the ex wife of Detective Quentin (Paul Blackthorne). Dinah will return to Starling City later this season to make amends with the family she abandoned years ago.
Actress Alex Kingston will be well known to American audiences for her wide range of roles; she played Dr. Elizabeth Corday in ER which is probably her best known role. Kingston’s other notable roles on US television include CSI, FlashForward, Law & Order: Special Victims Unit, Private Practice and NCIS.
Kingston’s British roles include playing Blanche Mottershead in Upstairs Downstairs, Helen Maynard in Marchlands and Mrs Bennett in Lost in Austen. The actress also plays the recurring role of River Song in Doctor Who. Fellow Arrow actor John Barrowman played Captain Jack Harkness on the sci-fi series before being spun-off into his own series, Torchwood.
Press rumours surrounding the 50th anniversary of Doctor Who, which will take place in November of this year, claim various companions will return. Fans speculation lists returns for Jack Harkness and River Song as likely to happen given their importance in the Who universe.
[Written by Dominic Knight and James Ryder, source Entertainment Weekly]