was renewed for a The Flash sixth season by The CW on January 31, 2019. It will premiere on October 8, 2019  and consist of 22 episodes. 
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 events of " ". Legacy
 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. Crisis on Infinite Earths
 The second half of the season will feature a different "Big Bad" than the first half.
 Killer Frost will get a new suit.
 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.
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:
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.
The Flash Season 6 Official Trailer - Comic Con 2019
1.0 1.1 1.2 1.3
The CW Fall Premiere Dates: 'Batwoman' Leads Off Season - The Hollywood Reporter
"CW Renews Flash, Riverdale, Dynasty, Charmed, Supernatural Plus 5 Others" - TVLine ↑
3.0 3.1 3.2 3.3 3.4 3.5
"CRISIS ON INFINITE EARTHS Will Loom Through Entire Season of CW's THE FLASH" - Newsarama ↑
4.0 4.1 4.2 4.3 4.4
"Comic-Con 2019: The Flash Cast Says WestAllen Will Face Some 'Good Marital Tension' in Season 6" - YouTube ↑
5.0 5.1 5.2
"The Flash Comic-Con®️ 2019 Sizzle | The CW" - YouTube ↑
6.0 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9
"The Flash @ Comic-Con: Series Vet Cast as 'Crisis' Pariah — Plus, Get Scoop on Season 6's Double Villain Plan" - TVLine ↑
"‘The Flash’: Sendhil Ramamurthy To Play DC Villain Bloodwork On Season 6 – Comic-Con" - Deadline ↑
"Flash Season 6 Brings Back Wally West; Tom Cavanagh Plays Crisis' Pariah" - Screen Rant ↑
The Flash star Grant Gustin previews how 'Crisis' will affect season 6" - Entertainment Weekly
"The Flash : Danielle Panabaker on set of episode 601 in new Killer Frost attire - with Hartley Sawyer as Elongated Man" - Canadagraphs
"The Flash Battles Godspeed In New Season 6 Set Photos" - Screen Rant
"The Flash shoots scenes for episode 601 with Danielle Panabaker, Hartley Sawyer and Jesse L Martin" - Canadagraphs ↑
Danielle Panabaker (@dpanabaker) - Twitter
"The Flash: Season 6 Episode 2 Title Drops a Major “Crisis on Infinite Earths” Tease" - Comic Book ↑
15.0 15.1 15.2
"Shows A-Z - flash, the on cw" - The Futon Critic
"Arrowverse 'Crisis on Infinite Earths' Crossover Adds Black Lightning Stars, Bruce Wayne — Get Full Schedule" - TVLine
"Credits" - Eric Dean Seaton ↑
"Flash Names New Boss for Season 6" - TVLine