Danielle Campbell as TESSA MERLYN
"Wonder Star"

Grant Gustin as BARRY ALLEN
"Flash"

Danielle Panabaker as CAITLIN SNOW

Carlos Valdes as CISCO RAMÓN
"Vibe"

Stephen Amell as OLIVER QUEEN
"Green Arrow"

Willa Holland as THEA QUEEN
"Speedy"

Caity Lotz as SARA LANCE
"White Canary"

Emily Bett Rickards as FELICITY SMOAK
"Overwatch"

Katie Cassidy as LAUREL LANCE
"Black Canary"

David Ramsey as JOHN DIGGLE
"Spartan"

John Barrowman as MALCOLM MERLYN
"The Dark Archer"

Claire Holt as EMMA DECKER

Jesse Lee Soffer as JAY HALSTEAD

Tom Cavanagh as HARRY WELLS

Violett Beane as JESSE WELLS

Candice Patton as IRIS WEST

Keiynan Lonsdale as WALLY WEST

Jesse L. Martin as JOE WEST

Marie Avgeropoulos as OCTAVIA

Katrina Law as NYSSA AL GHUL

And:
Colin Donnell as TOMMY MERLYN

Special Guest Star:

Wentworth Miller as LEONARD SNART
"Captain Cold"

Sebastian Stan as JAMES MORGAN

Teddy Sears as HUNTER ZOLOMON "JAY GARRICK"
"Zoom"

Victor Garber as MARTIN STEIN
"Firestorm"

Shantel VanSanten as PATTY SPIVOT