Season 6 (The Flash)

​​​​​​ was renewed for a sixth season by The CW on January 31, 2019. It will premiere on October 8, 2019.

Main Cast

 * Grant Gustin as Barry Allen/The Flash
 * Candice Patton as Iris West
 * Danielle Panabaker as Dr. Caitlin Snow/Killer Frost
 * Carlos Valdes as Cisco Ramon
 * Hartley Sawyer as Ralph Dibny/Elongated Man
 * Danielle Nicolet as District Attorney Cecille Horton
 * Tom Cavanagh as TBA and Pariah
 * Jesse L. Martin as Captain Joe West

Recurring Cast

 * Sendhil Ramamurthy as Dr. Ramsey Rosso/Bloodwork
 * Keiynan Lonsdale as Wally West/Kid Flash
 * Victoria Park as Kamilla Hwang

Confirmed plot points

 * The Monitor shows up and "says the universe is in danger and the only way to save it is for Barry to sacrifice himself". That news weighs "pretty heavily" on Barry.
 * Tom Cavanagh will play both Pariah and a new Wells.
 * This season has been described as the "season of thrills and chills".
 * Fans will get to see Killer Frost in S.T.A.R. Labs and "trying to live a life".
 * Barry and Iris will be dealing with the loss of their daughter Nora in "different ways".
 * Iris' Central City Citizen will play a bigger role, with new employees set to show up very soon.
 * Barry's new Flash suit will feature a completely new cowl.
 * This season will have more heart than previous seasons.
 * The first episode of the season takes place seconds after.
 * The back half of the season will be about dealing with the fallout from the events of.
 * The second half of the season will feature a different "Big Bad" than the first half.
 * Killer Frost will get a new costume.
 * Wally West/Kid Flash will return.
 * Godspeed will return.

Confirmed characters

 * Ramsey Rosso: A brilliant physician with a genius intellect, and the world’s leading expert on hematological oncology. A former colleague of S.T.A.R. Labs' Caitlin Snow, Rosso rekindles their friendship after they are reunited by an unexpected event. But their longtime bond is quickly shattered when the doctor's desire to defy the laws of nature takes him down a dark path, one that transforms Rosso from an old friend into the most chilling villain Team Flash has ever faced; the monstrous Bloodwork.
 * Pariah: A DC comics character whose unorthodox experiments to view the creation of the universe result in the Anti-Monitor learning of the existence of his Earth and destroying it with waves of anti-matter.

Production
Executive producer Eric Wallace will take over as the sole showrunner this season because Todd Helbing stepped down from the position at the end of last season to focus on development.