when does laurel's sister come back in arrow
Sara Lance In season two, Sara returns to Starling City after a six year absence as "The Canary" to protect her family. In keeping with a promise, she also befriends wayward teenager Sin and watches over her. Oliver manages to capture and unmask The Canary, revealing Sara to be alive. She eventually informs her father, SCPD Detective Quentin Lance, and looks after him and Laurel (who also later discovers sheâ€™s alive as is a vigilante). Sara joins Team Arrow and revisits a brief relationship with Oliver. She aids him and his colleagues Felicity Smoak, John Diggle, and Roy Harper in taking down a drug-enhanced Slade Wilson, with help from the League of Assassins, which requires Sara to return to Nanda Parbat.