Access Hollywood reports that Star Trek Voyager star Jeri Ryan has been cast as a guest star in Arrow season 4, episode 2, "The Candidate."
While Newsarama previously speculated that the title may refer to Oliver's political ambitions, it appears that Ryan may be the candidate in question. The report states that Ryan will play Jessica Danforth, “A friend of the Queen family. Her political ambitions will place her in the crosshairs of a menacing antagonist.”
Interestingly enough, before Ryan rose to fame in Star Trek Voyager, she had a small role in the early 1990s The Flash playing Felicia Kane.
Arrow season 4 is currently in production in Vancouver, and will premiere on October 7, 2015.