'The Flash' Season 6 Episode 15 Promo: Barry desperate to defeat Reverse-Flash, will engineer new Speed Force

The next episode of 'The Flash' will release on March 17
Grant Gustin as Barry Allen (The CW)
Grant Gustin as Barry Allen (The CW)

Things are about to get wilder in 'The Flash'. The Reverse-Flash is back and he promises to unleash hell. He's in Nash Wells's body and promises that he will kill him first, followed by other people dear to Barry. That's not the only problem Barry Allen is facing. The Speed Force just died, due to leftover complications from the Crisis, and Barry has decided to engineer a new Speed Force. How will he do that? Only he knows.

The next episode, titled 'The Exorcism Of Nash Wells', sees Thawne messing with Barry's mind, as always and playing on his emotions. Pushed to the brink, Barry resorts to taking steroids, much to Caitlin's surprise.

The synopsis of the episode reads, "A DANGEROUS NEW META HITS CENTRAL CITY – The Flash (Grant Gustin) takes on a dangerous new meta named Sunshine (guest star Natalie Sharp). Cisco (Carlos Valdes) sets out to help Nash (Tom Cavanagh). Eric Dean Seaton directed the episode written by Lauren Barnett & Sterling Gates."

In an earlier interview, showrunner Eric Wallace had hinted that Cisco's little break would have provided some clues to the pressing matters at hand. [Cisco and Carlos] are not going anywhere," he had said. "Cisco's off on his journey to catalog the world, but he'll be back very quickly And the information he learns out there in the world is going to help us solve one of the biggest things Team Flash has ever dealt with, and that involves the return of an old villain, which I won't spoil."

Wallace said they would be telling the 'craziest' Flash story yet. “I challenged everybody [on the writing staff] to tell the craziest Flash story ever, in all six seasons, and boy have they brought it," he said. 

This episode will release on March 17 at 9 pm on The CW.



 

GET THE BIGGEST ENTERTAINMENT STORIES
STRAIGHT TO YOUR INBOX.

MORE STORIES

Daniel Radcliffe bluntly reveals if he’ll watch the new ‘Harry Potter’ reboot
2026-11-10T09:33:32.000Z
Sonny discovers a possible link between Tracy Marks and Ellen in Episode 5, while Connie Britton reveals how makeup and VFX transformed her appearance.
2026-11-10T08:22:15.000Z
As ‘VisionQuest’ approaches its finale, Terry Matalas shares his hopes for more stories involving Vision and Ultron
2026-11-10T07:14:46.000Z
The series follows Benny, a former football player and homecoming king who forms a close relationship with Carmen
2026-11-10T05:54:22.000Z
Torres finds himself undercover in his latest mission, where a mysterious character complicates things for him
2026-11-10T04:10:28.000Z
Cher Horowitz has a teenager of her own in the Paramount+ sequel, and one of her former classmates is returning on screen and in the writers’ room.
2026-11-09T20:01:16.000Z
‘VisionQuest’ reportedly saves its only mid-credits scene for the finale, sparking theories about a possible ‘Avengers: Doomsday’ connection
2026-11-09T17:56:28.000Z
Katrina Law calls the new ‘NCIS’ episode her favorite acting job and recalls how a rehearsal with her scene partner took an unexpected turn.
2026-11-09T16:36:10.000Z
'North of North' Season 2 follows Siaja's search for her estranged sister, navigates workplace challenges, and explores her growing feelings for Kuuk.
2026-11-09T15:48:33.000Z
An X post from a Marvel insider sets up the next chapter for Vision ahead of the ‘VisionQuest’ finale
2026-11-09T09:40:28.000Z