|Season 5, Episode 15|
|Episode Guide Transcript|
See You Again
Once is the fifteenth episode of Arrow Season 5 and the 107th episode overall.
ZOOM TAKES HIS REVENGE- Oliver Queen, Laurel Lance, Nyssa al Ghul, and Tommy Merlyn head to Central City as Zoom executes his long-pondered vengeance scheme against Team Flash, aided by Laurel Lance (Earth 2), Mad Harriet, and Lashina. Meanwhile, Darkseid works to permanently subjugate Kara's personality in order to maintain control of her body.
- Stephen Amell as Oliver Queen/Green Arrow
- Katie Cassidy as Laurel Lance/Black Canary/Laurel Lance (Earth 2)/Black Siren
- Katrina Law as Nyssa al Ghul
- Melissa Benoist as Darkseid
- Colin Donnell as Tommy Merlyn
Special Guest StarsEdit
- David Ramsey as John Diggle/Guardian
- Grant Gustin as Barry Allen/The Flash
- Danielle Panabaker as Caitlin Snow/Killer Frost
- Carlos Valdes as Cisco Ramon/Vibe
- with Richard Armitage as Steve Trevor
- and Zachary Quinto as General Dru-Zod
- Teddy Sears as Hunter Zolomon/Zoom
- Luke Evans as Bruce Wayne
- Emily Swallow as Amara
- Lindsay Hartley as Mad Harriet
- Nanzeen Contractor as Lashina
- Emma Rigby as Mina Murray
- Antagonists: Hunter Zolomon, Laurel Lance (Earth 2), Mad Harriet, Lashina
- The majority of this episode takes place in Central City.
- This is the first Flash/Arrow crossover outside of the 8th episodes of each season.
- This episode focuses on the surviving members of Team Flash teaming up with Zod to take down Zoom and Black Siren, who have allied themselves with Darkseid.