Stephen Amell
as Oliver Queen / The Arrow
David Ramsey
as John Diggle
Emily Bett Rickards
as Felicity Smoak
Willa Holland
as Thea Queen
Paul Blackthorne
as Detective Quentin Lance
Katie Cassidy
as Laurel Lance
Echo Kellum
as Curtis Holt
Colton Haynes
as Roy Harper
Rick Gonzalez
as Rene Ramirez
Juliana Harkavy
as Dinah Drake
John Barrowman
as Malcolm Merlyn
Katie Cassidy
as Laurel Lance (Earth Two) / Black Siren
Susanna Thompson
as Moira Queen
Manu Bennett
as Slade Wilson
Colin Donnell
as Tommy Merlyn
Kirk Acevedo
as Ricardo Diaz
Josh Segarra
as Adrian Chase
Ben Lewis
as William Clayton (Adult)
Katherine McNamara
as Mia Smoak
Joseph David-Jones
as Connor Hawke
Sea Shimooka
as Emiko Queen
LaMonica Garrett
as The Monitor
Rick Gonzalez
as Rene Ramirez (Earth Two)
Juliana Harkavy
as Sergeant Dinah Drake (Earth Two)
LaMonica Garrett
as Mobius / The Anti-Monitor