Following last night's episode, which brought to a close the trilogy of episodes dealing with the chaos unleashed on Starling City during Oliver Queen's absence, the CW aired the first trailer for next week's "Arrow" installment. This first look at "Canaries" reveals a number of things: Vertigo (Peter Stormare) is back in business and Laurel's got a mean right hook.

The episode will see the return of Caity Lotz's Sara Lance, the first character in the "Arrow"-verse to use the Canary name. The preview indicates that the return of Laurel's very dead sister will be a result of her taking a "lethal dose" of Vertigo's perception altering drug. Nightmare or not, though, we'll get to see Canary fight Canary. You can check out the trailer and synopsis below.

"Canaries" - (8:00-9:00 p.m. ET) (TV-14, LV) (HDTV)

VERTIGO (GUEST STAR PETER STORMARE) RETURNS AND PITS CANARY AGAINST BLACK CANARY - Oliver (Stephen Amell) is thrown by the changes within Team Arrow. He's used to calling the shots but sees that the team has evolved in his absence and tensions quickly escalate in the lair. Oliver is furious that Laurel (Katie Cassidy) has been going out as the Black Canary and tells her to stop risking her life, but when Vertigo (guest star Peter Stormare) hits the streets again, Laurel goes against Oliver's wishes and tracks down Vertigo who hits her with a full dose of the drug. Laurel's biggest fears revolve around her sister Sara (guest star Caity Lotz) so the Vertigo causes her to hallucinate an epic fight between Canary and Black Canary. Meanwhile, Chase (guest star Austin Butler) surprises Thea (Willa Holland), and Roy (Colton Haynes) warns Thea to stay away from Malcolm (John Barrowman). Michael Schultz directed the episode written by Jake Coburn & Emilia Ortega Aldrich (#313). Original airdate 2/11/2015.