Season 6 (The Flash)

​​​​​​ was renewed for a sixth season by The CW on January 31, 2019. It will premiere on October 8, 2019 and consist of 22 episodes.

Main cast

 * Grant Gustin as Barry Allen/The Flash
 * Candice Patton as Iris West-Allen
 * 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, Eobard Thawne/Reverse-Flash 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
 * LaMonica Garrett as Mar Novu/The Monitor and the Anti-Monitor

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 Eobard Thawne/Reverse-Flash, Pariah, and a new Wells doppelgänger.
 * 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 events of.
 * This season will be divided into "graphic novels". The first batch will be pre-Crisis episodes while the second half will deal with the fallout of Crisis, with in between.
 * The second half of the season will feature a different "Big Bad" than the first half.
 * The first "Big Bad" will be Dr. Ramsey Rosso/Bloodwork.
 * The second "Big Bad" will be the Red Death.
 * Killer Frost will get a new suit this season.
 * Wally West/Kid Flash will return.
 * August Heart/Godspeed will return.
 * Sue Dearbon will appear.
 * Iris will grow as a journalist.
 * Killer Frost will be more in charge as Caitlin will take a little break.
 * The new Wells doppelgänger will be unique and has a huge role to play in ‘Crisis’.
 * Cisco will be faced with the fallout from taking the Meta-human cure.

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.
 * Sue Dearbon:
 * Anti-Monitor:

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.