We already know Stephen Amell has been cast as the titular emerald archer, and "Dexter" alum David Ramsey has also come on board as ex-military operative and Oliver's security expert John Diggle. Now, TV Line reports that "Once And Again" actress Susanna Thompson has joined the cast as Moira Queen, mother of Oliver.
In the initial cast breakdowns for Moira, Oliver's mother is described as follows:
48 years old, a beautiful woman, Oliver’s mother Moira is a very wealthy woman who is not used to being shaken. Having remarried during the five years that former husband Robert and Oliver were both presumed dead, Moira has had free rein over the Queen billions. Not surprisingly, she’s deeply interested in learning whether or not Robert will also return unexpectedly, to ruin her present marriage and go over the books with a fine-tooth comb.
With Thompson, Amell and Ramsey in place, there are still three central roles left to be cast for the pilot. Those characters include comic book favorites Dinah "Laurel" Lance (alias Black Canary) and Tommy Merlyn, Oliver's eventual arrow-slinging nemesis.
The set-up for "Arrow" has been described as follows: "After being marooned for five years on a deserted island, former billionaire playboy Oliver Queen returns with a mysterious agenda and lethal set of new skills that he uses in a war on crime."
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