<Tr> <Td_colspan="2"> List of Arrow episodes </Td> </Tr> <P> The second season of the American television series Arrow premiered on The CW on October 10, 2013 and concluded on May 14, 2014 with a total of 23 episodes . The series is based on the DC Comics character Green Arrow, a costumed crime - fighter created by Mort Weisinger and George Papp . The showrunners for this season were Greg Berlanti, Marc Guggenheim and Andrew Kreisberg . This season introduces characters from The Flash, which was being developed as a potential spin - off at the time . </P> <P> The series follows Oliver Queen (Stephen Amell), billionaire playboy of Starling City, who spends five years shipwrecked on a mysterious island . Upon his return to Starling City, he is reunited with his mother, Moira Queen (Susanna Thompson) and his sister, Thea Queen (Willa Holland). In season two, following on from the devastating events of the Undertaking, including the death of his best friend Tommy Merlyn (Colin Donnell), Oliver has vowed to stop crime without killing criminals, with the continuing aid of close allies John Diggle (David Ramsey) and Felicity Smoak (Emily Bett Rickards). Oliver's vow is tested when he comes under attack from Slade Wilson (Manu Bennett), a man from Oliver's time on the island who resurfaces with a vendetta against him . Oliver must also contend with outside forces attempting to take over Queen Consolidated, guilt from decisions he made in the past, and secrets harbored by his family and friends . Oliver grows to accept aspiring vigilante Roy Harper (Colton Haynes) as his protégé, and begins to receive assistance from Laurel's father, Officer Quentin Lance (Paul Blackthorne). Oliver also gains another ally; a mysterious woman in black, who is eventually revealed to be Laurel's sister, Sara Lance (Caity Lotz), who had survived her ordeal at sea years prior . </P> <P> In flashbacks, the continuing story of Oliver's time on Lian Yu is told, as he faces a new threat from Dr Anthony Ivo (Dylan Neal), whilst continuing to struggle to survive alongside allies Shado (Celina Jade), Slade Wilson (Manu Bennett) and Sara Lance (Caity Lotz). </P>

Who played sara lance in arrow season 2