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For the Batwoman episode, see "Who Are You?".
"Someone once told me that a circumstance can make something poison or nectar. What they meant was we get to choose what we are, we get to choose who we are. So tell me... who are you?"
Oliver to Black Siren

"Who Are You?" is the tenth and midseason premiere episode of the fifth season of Arrow, and the one-hundred-second episode overall. It aired on January 25, 2017.



Prometheus breaks Black Siren out of prison

Prison break

Oliver is shocked to see Laurel Lance alive in the Arrowcave. She claims it's a result of time travel. Felicity arrives and is also shocked. Laurel then explains, how the Legends were able to bring her back without causing a time aberration. Felicity arranges a return party for Laurel. She is also eager to see John and Thea. Mentioning of John reminds Felicity, that John as been arrested. Oliver goes to see him and also mentions Laurel's return. John finds himself in a difficult situation, but unlike last time, he is going to fight the false charges. Oliver arranges a lawyer for him.

In Felicity's apartment, Laurel speaks with Thea on the phone, and everyone present are having mixed feelings for Laurel. They then make a toast. Later, Felicity is back in the Arrowcave running a DNA-test on the glass Laurel used, when Rory arrives. He deduces that Felicity has suspicions over Laurel. The DNA-test turns positive, and Rory begins to joke that maybe it's a twin, an evil twin. His joke actually hits a nail, as Felicity realizes with horror, that Laurel actually has an evil twin: her doppelganger from Earth-2, Black Siren, who was supposedly locked up in S.T.A.R. Labs. Felicity attempts to call Cisco Ramon, but Black Siren appears and stops her with her sonic scream. She incapacitates Felicity and Rory, but Oliver appears and forces her to retreat.

Prometheus and Black Siren


The team is fixing up the cave and Curtis explains Rene about Earth-2. Felicity and Oliver watch a security footage Cisco sent, which clearly shows, that Black Siren was freed from S.T.A.R. Labs by Prometheus, as yet another means to cause emotional blow to Oliver. Black Siren meets Prometheus and he is disappointed, that she failed. He warns her.

Black Siren later called Oliver and apologized for attacking him, claiming that Prometheus forced her to do so and offered to help. While skeptical, Oliver agreed to hear her out and they met at the Black Canary statue. Green Arrow was skeptical about her story but Black Canary insisted she was being used. As Black Siren offered to help however, Ragman, Wild Dog, and Mr. Terrific attacked her. Black Siren used her powers to knock them all to the ground, destroying the Black Canary statue in the process. However, Green Arrow used a tranquilizer arrow to render Black Siren unconscious.

Black Siren woke up in a meta-human cell in the Arrowcave, much to her annoyance, and insisted that she was being honest about being used by Prometheus. However, Oliver was distrustful given what Team Flash told him about her history as Zoom's lieutenant. Laurel didn't blame him for his distrust, admitting that she has made several bad choices since gaining her powers. Laurel told Oliver about her relationship with his Earth-2 counterpart and how his death sent her down that path, expressing her belief that she was no longer capable of being anything other than a criminal. Taking pity on her, Oliver tried to convince Black Siren that nobody is beyond saving, and offered her protection against Prometheus if she told him what she knew about him. While Black Siren was ultimately manipulating Oliver into lowering his guard, her words did appear at least somewhat genuine.

Later when Felicity gave Black Sirena glass of water, Black Siren wondered what happened between her and Oliver, aware of their failed relationship. She mockingly asked if Felicity had a sister, sneering how she heard Oliver "loves sisters". Unlike Oliver, Felicity did not believe Black Siren was capable of redemption and told her to get used to being locked up, to which Black Siren stared at her in contempt. Suddenly, the power went out and Black Siren used this opportunity to escape. Unbeknownst to her, Felicity placed tracking nanites in the glass of water she drank, hoping it would lead Team Arrow to Prometheus.

Black Siren went to a warehouse to meet up with Prometheus, where they were attacked by Team Arrow. While Prometheus was occupied with Ragman and Green Arrow, Black Siren incapacitated Wild Dog and Mr. Terrific before taunting Felicity about killing her too. Just then, Green Arrow appeared and begged Laurel not to, pleading that if she kills Felicity, then she truly is beyond saving. Green Arrow tried to convince Black Siren she can still be who she was before she lost her family, and he could help her find that person again. Despite appearing to consider his words, Black Siren simply retorted, "she was never there" and attacked Felicity but Green Arrow protected her. As Black Siren tried to kill them both, Mr. Terrific used a dampening device to negate her powers and Felicity swiftly knocked her out.

Rather than being sent back to S.T.A.R. Labs, Black Siren was instead transported to A.R.G.U.S. custody, both for improved security measures and so Oliver can keep her close, hoping to help her find redemption one day.


Main cast[]

Special guest star[]

Guest starring[]



Preparation ran from October 12 until October 20, 2016. Filming ran from October 21 until November 1, 2016.[1]


  • While wondering how his doppelgänger on Earth-2 could be different from him, Curtis asks to himself: "What if I'm straight?". This is a potential reference to his comic book counterpart, Michael Holt, who is heterosexual.
  • When Earth-2 Laurel is telling Oliver her backstory, she tells him "-Once you let the darkness inside, it never comes out". This is similar to what Helena Bertinelli told Earth-1 Laurel in "Birds of Prey", which Earth-1 Laurel herself quoted to Kate Spencer when blackmailing the latter for her job back.
  • Curtis mentions that Prometheus "Henry Higgins'd [Black Siren] into coming off as real Laurel." This is a reference to the play Pygmalion and its 1956 musical adaptation My Fair Lady; Higgins, a phoneticist, makes a wager that he train Eliza Doolittle, a Cockney flower girl, to act and speak like a prim and proper lady of the upper class.
  • Before fighting her, Wild Dog calls Black Siren "Trinity", a reference to Carrie Anne Moss' character in The Matrix trilogy, who wears a similar leather coat.
  • This episode establishes that Prometheus is aware of the existence of the multiverse and time travel, specifically the existence of the Waverider. This indicates that he has been keeping tabs on the activities of Team Flash and the Legends as well.
  • Jeffrey Dahmer is listed as the Warden of Langham Prison, where Diggle is to be transferred. In real life, Jeffrey Dahmer was a serial killer who murdered numerous men and boys from 1978 to 1991. He was convicted and received multiple life sentences before ultimately being murdered by a fellow inmate in 1994.
  • The title comes from a line Oliver was told in the Bratva, which he also said to Earth-2 Laurel during his interrogation of her.