Heroes Join Forces

"Everyone in there is willing to die to protect us. You don't think that's a little bit insane? No. I think it's noble. I think it's what makes them all heroes."

- Kendra Saunders and Carter Hall

Heroes Join Forces is the name of the second Arrowverse crossover between and ​​​​​. It began December 1, 2015, and finished on December 2, 2015.

Cast

 * Grant Gustin as The Flash (Barry Allen)
 * Candice Patton as Iris West
 * Danielle Panabaker as Caitlin Snow
 * Carlos Valdes as Vibe (Cisco Ramon)
 * Tom Cavanagh as Harry Wells
 * Jesse L. Martin as Joe West
 * Stephen Amell as Green Arrow (Oliver Queen)
 * Katie Cassidy as Black Canary (Laurel Lance)
 * David Ramsey as Spartan (John Diggle)
 * Willa Holland as Speedy (Thea Queen)
 * Emily Bett Rickards as Felicity Smoak
 * John Barrowman as Ra's al Ghul (Malcolm Merlyn)
 * Ciara Renée as Hawkgirl (Kendra Saunders) / Chay-Ara
 * Neal McDonough as Damien Darhk
 * Teddy Sears as Jay Garrick
 * Casper Crump as Vandal Savage
 * Falk Hentschel as Hawkman (Carter Hall) / Khufu
 * Anna Hopkins as Samantha Clayton
 * Shantel VanSanten as Patty Spivot
 * Peter Francis James as Aldus Boardman
 * Jack Moore as William Clayton
 * David Allen Pearson as Captain
 * Michael St. John Smith as Harbor Police Chief
 * Michael Tiernan as Ramesses II