Summer Glau has been cast in a recurring role on the CW‘s Arrow, which kicks off its second season October 9. Glau, who has amassed plenty of genre street cred in TV series like Joss Whedon’s Firefly and Dollhouse, Terminator: The Sarah Connor Chronicles and most recently as a recurring on Syfy’s Alphas, is set to play the dangerous Isabel Rochev, Vice President of Acquisitions of Stellmoor International, a company looking to take over Queen Consolidated. Arrow gained an early second season pickup in February and was the CW’s breakout hit last season, performing strongly after it posted the network’s best series-premiere numbers since 2009. Glau is repped by UTA and the Schiff Co.