Armageddon

Armageddon is the name of the seventh annual crossover and a story arc of the eighth season of.

Synopsis
A powerful alien threat arrives on Earth under mysterious circumstances and Barry, Iris and the rest of Team Flash are pushed to their limits in a desperate battle to save the world. But with time running out, and the fate of humanity at stake, Flash and his companions will also need to enlist the help of some old friends if the forces of good are to prevail.

Cast

 * Grant Gustin as The Flash (Barry Allen) & Reverse-Flash (Eobard Thawne)
 * Candice Patton as Iris West-Allen
 * Danielle Panabaker as Caitlin Snow
 * Danielle Nicolet as Cecile Horton
 * Kayla Compton as Allegra Garcia
 * Brandon McKnight as Chester P. Runk
 * Tony Curran as Despero
 * Javicia Leslie as Batwoman (Ryan Wilder)
 * Brandon Routh as The Atom (Ray Palmer)
 * Cress Williams as Black Lightning (Jefferson Pierce)
 * Chyler Leigh as Sentinel (Alex Danvers)
 * Kat McNamara as Green Arrow (Mia Queen)
 * Osric Chau as The Atom (Ryan Choi)
 * Tom Cavanagh as Reverse-Flash/Harrison Wells (Eobard Thawne)
 * Neal McDonough as Damien Darhk
 * Carmen Moore as Kristen Kramer
 * Stephanie Izsak as Daisy Korber
 * Kandyse McClure as TBA
 * Natalie Dreyfuss as Sue Dearbon