WARNING: This article contains spoilers for this week's episode of "Arrow."

Laurel Lance returned from the grave last night on "Arrow." However, what should've been a happy occasion, turned out to be a double cross by Prometheus involving Earth 2's Laurel Lance, aka the Black Siren.

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In the promo for next week's episode, "Second Chances," Oliver begins to move forward with the promise he made to Laurel on her death bed: to train a new Black Canary. Team Arrow finds Tina Boland, a woman with a cry remarkably similar to that of Laurel and Black Siren. In the flashbacks, Talia offers to help Oliver take down Konstantine Kovar.

TALIA AL GHUL TAKES OLIVER UNDER HER WING — In his quest to take down Kovar, Oliver (Stephen Amell) gets help from a surprising source – Talia al Ghul (guest star Lexa Doig). However, when she reveals what she wants from him in exchange, Oliver isn’t sure he can accept her help. Felicity (Emily Bett Rickards) attempts to hack the NSA to help free Diggle (David Ramsey) but when her online efforts are flagged, she faces off against an unknown adversary. Meanwhile, Curtis (Echo Kellum) tells the team about a female vigilante, Tina Boland (guest star Juliana Harkavay), he uncovered online who has been wreaking havoc all over the country.

Airing Wednesdays at 8 p.m. ET/PT on The CW, “Arrow’ stars Stephen Amell, Emily Bett Rickards, David Ramsey, Willa Holland, Paul Blackthorne and Echo Callum.