See Caity Lotz Return to 'Arrow' as Sara Tries to Help Laurel (PHOTOS)

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Arrow - Lost Canary
Dean Buscher/The CW
Lost Canary
Dean Buscher/The CW

Laurel Lance/Black Siren (Katie Cassidy) and her old criminal acquaintance, Aviva Metula/Shadow Thief (Carmel Amit)

Lost Canary
Dean Buscher/The CW

Laurel Lance/Black Siren (Katie Cassidy)

Lost Canary
Dean Buscher/The CW

Will Dinah Drake/Black Canary (Juliana Harkavy), Felicity Smoak/Overwatch (Emily Bett Rickards), and Sara Lance/White Canary (Caity Lotz) be able to stop Laurel Lance/Black Siren (Katie Cassidy)?

Lost Canary
Dean Buscher/The CW

The Canaries stand together: Dinah Drake/Black Canary (Juliana Harkavy) and Sara Lance/White Canary (Caity Lotz).

Lost Canary
Dean Buscher/The CW

Felicity Smoak/Overwatch(Emily Bett Rickards)

Lost Canary
Dean Buscher/The CW

Sara Lance/White Canary (Caity Lotz)

Lost Canary
Dean Buscher/The CW

Dinah Drake/Black Canary (Juliana Harkavy)

Lost Canary
Dean Buscher/The CW

Can Felicity Smoak/Overwatch (Emily Bett Rickards) get through to Laurel Lance/Black Siren (Katie Cassidy)?

Arrow - Lost Canary
Dean Buscher/The CW

Which side is Laurel Lance/Black Siren (Katie Cassidy) on? Here, she stands with Sara Lance/White Canary (Caity Lotz), Felicity Smoak/Overwatch (Emily Bett Rickards), and Dinah Drake/Black Canary (Juliana Harkavy) behind the scenes.

Lost Canary
Dean Buscher/The CW

Behind the scenes with two Lance women from two Earths: Sara Lance/White Canary (Caity Lotz) and Laurel Lance/Black Siren (Katie Cassidy)

Lost Canary
Dean Buscher/The CW

Whose grave are Sara Lance/White Canary (Caity Lotz) and Laurel Lance/Black Siren (Katie Cassidy) visiting?

Lost Canary
Dean Buscher/The CW

Felicity Smoak (Emily Bett Rickards) in 2040 in the flashforwards

Lost Canary
Dean Buscher/The CW

Felicity Smoak (Emily Bett Rickards) and Dinah Drake/Black Canary (Juliana Harkavy) in 2040 in the flashforwards

Lost Canary
Dean Buscher/The CW

What are Mia Smoak/Blackstar (Katherine McNamara), Zoe Ramirez (Andrea Sixtos), Felicity Smoak (Emily Bett Rickards), and Dinah Drake/Black Canary (Juliana Harkavy) planning in 2040?

Lost Canary
Dean Buscher/The CW

Mia Smoak/Blackstar (Katherine McNamara) in 2040 in the flashforwards

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Will her friend or dead doppelganger's sister get through to Arrow's Earth-2 Laurel Lance/Black Siren (Katie Cassidy)? Or is she "lost" forever to the side of evil? New photos released by The CW for Episode 18 showcase the female characters, both in the present and flashforwards.

Following Emiko (Sea Shimooka) revealing Laurel's criminal past to the world, the Earth-2 doppelganger "goes full Black Siren" and reconnects with her former criminal acquaintance, Shadow Thief (guest star Carmel Amit).

Though Dinah (Juliana Harkavy) is focused on bringing in the (former?) villain, Felicity (Emily Bett Rickards) reaches out to Sara Lance (guest star Caity Lotz) in hopes she can help. But will that work, or is "Lost Canary" the end of Felicity and Laurel's friendship?

Also seen in the photos is a look at the team in the future — Felicity, Dinah, Mia Smoak/Blackstar (Katherine McNamara), and Zoe Ramirez (Andrea Sixtos) — continuing the fight to save Star City in 2040.

Arrow, Mondays, 9/8c, The CW