<P> 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 she '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 . </P>
<P> 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 she '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 . </P>
when does laurel 's sister come back in arrow
when does laurel 's sister come back in arrow
In season two
In season two