The Flash was renewed for a fourth season by The CW on January 8, 2017.[1] It premiered on October 10, 2017.


Main cast

Recurring Cast


"Running up against an evil time remnant version of yourself is something no one should ever have to do, but that’s exactly what faced Barry Allen (aka The Flash) as he fought to save the life of fiancée Iris West from the God of Speed known as Savitar."

"Barry’s victory was short-lived, however, as an unbalanced Speed Force began to wreak havoc on Central City, forcing Barry to sacrifice himself for the greater good."

"With The Fastest Man Alive now trapped inside an extra-dimensional energy, and unknown dangers lurking in the shadows, it will be up to Team Flash to free Barry from his own personal Hell."[5]

Confirmed plot points

Confirmed new characters

  • Veronica Dale/Hyrax: An Environmental Activist (back when she was still sane) turned Animal Liberator turned Domestic Terrorist, who's the leader of the Eden Corps - a cult-like organization that proposes to turn back the clock to a pre-industrial age - and if millions of innocent people have to die in the process, well, that's just tough.[4]
  • Jaco Birch: An obsessive music fanatic who worships at the altar of classic heavy metal.[12]


# Episode name Directed by Story by Teleplay by Original airdate
1 "The Flash Reborn" Glen Winter Andrew Kreisberg Todd Helbing & Eric Wallace October 10, 2017
With Barry in the speed force, Iris, Kid Flash, Joe and Vibe have taken over protecting Central City. However, when a powerful armored villain threatens to level the city if The Flash doesn't appear, Cisco makes a risky decision to break Barry out of the speed force. However, the Barry that comes out isn't the same Barry that went in.
2 "Mixed Signals" Alexandra La Roche Jonathan Butler & Gabriel Garza October 17, 2017
Barry has his hands full when he takes on a dangerous meta who can control technology, while also confronting an obstacle in his personal life; the ramifications of abandoning Iris for six months to balance the Speed Force. Meanwhile, Gypsy breaches in for a hot date with Cisco, but she gets annoyed when his work keeps them apart.
3 "Luck Be a Lady" Armen V. Kevorkian Sam Chalsen & Judalina Neira October 24, 2017
Barry and the team are hit by a string of bad luck and realize it is the handiwork of a new meta, Becky nicknamed Hazard, who has the ability to give others bad luck, while cashing in the benefits for herself. Meanwhile, Harry Wells returns to Earth-1 to give Wally a message from Jesse.
4 "Elongated Journey Into Night" Tom Cavanagh Sterling Gates & Thomas Pound October 31, 2017
Cisco is shocked when Gypsy's father, Breacher, shows up on Earth-1. Breacher takes an immediate disliking to Cisco and decides to hunt him. Meanwhile, Barry runs into his old nemesis, Ralph Dibny.
5 "Girls Night Out" Laura Belsey Lauren Certo & Kristen Kim November 7, 2017
Having received an ominous threat from her old boss, Amunet, Caitlin fears that her past time as Killer Frost may be back to haunt her. Felicity comes to Central City to help the girls celebrate Iris's bachelorette party, while Cisco, Joe and the guys take Barry out for a night on the town.
6 "When Harry Met Harry..." Brent Crowell Jonathan Butler & Gabriel Garza November 14, 2017
When collectors of Native American artifacts are attacked by a meta named Mina Chayton who can bring inanimate objects to life, Barry turns to a surprising ally for help. Determined to crack the identity of The Thinker, Harry enlists Cisco’s help to summon the ultimate think tank; "The Council of Wells", a roundtable of the brightest Harrison Wells’ from various Earths.
7 "Therefore I Am" David McWhirter Eric Wallace & Thomas Pound November 21, 2017
Barry comes face to face with DeVoe. DeVoe’s past is revealed through flashbacks. Meanwhile, Iris puts the final touches on the wedding, which is a week away.
8 "Crisis on Earth-X, Part 3" Dermott Downs Andrew Kreisberg & Marc Guggenheim Todd Helbing November 28, 2017
Barry and Iris's wedding brings the gang together, but things go awry when villains from Earth-X attack the ceremony. All of the superheroes band together with help from their super friends like Citizen Cold, The Ray, Felicity Smoak, Iris West and Alex Danvers to take on their most formidable villains yet. Earth’s mightiest heroes - Green Arrow, Supergirl, The Flash and White Canary - lead their teams into battle to save the world.
9 "Don't Run" Stefan Pleszczynski Sam Chalsen & Judalina Neira December 5, 2017
Amunet kidnaps Caitlin and puts meta-dampener handcuffs on her to keep her from turning into Killer Frost. Amunet tells Caitlin she needs her to perform a tricky medical task and if Caitlin fails, Amunet will kill her. Meanwhile, The Thinker traps The Flash in a speedster-proof prison. With the clock ticking, The Team doesn’t have the time or resources to track both Caitlin and Barry so Iris is forced to choose who to save.
10 "The Trial of The Flash" Philip Chipera Lauren Certo & Kristen Kim January 16, 2018
As Barry’s trial for the murder of Clifford DeVoe begins, Iris and Joe must decide how far they are willing to go to keep Barry out of prison.
11 "The Elongated Knight Rises" Alexandra La Roche Sterling Gates & Thomas Pound January 23, 2018
When a familiar villain returns to terrorize Central City, Ralph must rise up to defend the innocent while Barry is detained by his trial. Meanwhile, Barry searches for the strength to keep his optimism alive in the face of his new circumstances.
12 "Honey, I Shrunk Team Flash" Chris Peppe Sam Chalsen & Judalina Neira January 30, 2018
A meta who can shrink anything he touches battles Team Flash. Cisco and Ralph get caught in his crossfire and are shrunk to miniature versions of themselves. Cecile realizes her pregnancy has caused her to have temporary powers and discovers she can hear other people's thoughts, which unnerves Joe. Meanwhile, Barry meets someone with a mysterious connection to Henry Allen.
13 "True Colors" Tara Nicole Weyr Jonathan Butler & Gabriel Garza February 6, 2018
After hearing that Amunet has struck a deal to buy all of the metahumans in Iron Heights, Barry must decide if he should expose his powers in order to save his cellmates. After a visit from an old friend, Ralph is reminded of his shady past and wonders if he’s really a changed man.
14 "Subject 9"[13] Ralph Hemecker[14] Mike Alber & Gabe Snyder[14] February 27, 2018[14]
Barry meets a powerful woman whose abilities could help him in his battle with DeVoe. Meanwhile, after learning that DeVoe is targeting everyone who was on the bus, Ralph decides he doesn’t want to be a hero anymore, his only concern is staying alive. Harry offers to help Joe.[14]
15 "Enter Flashtime"[15] Gregory Smith[16] Todd Helbing & Sterling Gates[11] March 6, 2018[11]
When a nuclear bomb detonates in downtown Central City, Barry, Jesse Quick and Jay Garrick slow down time by entering Flashtime. As everyone in the city is frozen, the three speedsters push themselves to the breaking point to save the city and everyone in it.[11]
16 "Run Iris, Run"[17] TBA TBA TBA
17 "Null and Annoyed"[18] Kevin Smith[19] Lauren Certo & Kristen Kim[20] TBA


Title cards

Promotional images



  1. The CW renews seven series including 'Arrow,' 'The Flash,' 'Supernatural' and 'Crazy Ex-Girlfriend' - LA Times
  2. 2.0 2.1 ‘The Flash’: Andrew Kreisberg & Danny Trejo on Breacher, The Thinker, and the Crossover - Collider
  3. 3.0 3.1 ‘The Flash’ Spoilers: Is Anne Dudek Returning For Season 4? -
  4. 4.0 4.1 4.2 EXCLUSIVE: Barry Allen Will Face Off Against Hyrax On THE FLASH -
  5. The Flash Season 4 SDCC Panel Info Released -
  6. The Flash Season 4 Is About 'The Fastest Man Alive vs. Fastest Mind Alive' -
  7. 'Legends of Tomorrow' adds Keiynan Lonsdale as series regular -
  8. YVRShoots (@yvrshoots) - Twitter
  9. YVRShoots (@yvrshoots) - Twitter
  10. Kevin Smith Shares Look at Script for His Third Episode of 'The Flash' -
  11. 11.0 11.1 11.2 11.3 Flash Spoilers: “Enter Flashtime” Description - FlashTVNews
  12. Exclusive: Glee’s Max Adler To Set The Flash On Fire - FlashTVNews
  13. The Flash - Episode 4.14 - Title Revealed - Spoiler TV
  14. 14.0 14.1 14.2 14.3 Flash Spoilers: “Subject 9” Description - FlashTVNews
  15. The Flash - Episode 4.15 - Title Revealed - Spoiler TV
  16. Grant Gustin - Instagram
  17. The Flash - Episode 4.16 - Title Revealed - Spoiler TV
  18. The Flash - Episode 4.17 - Title Revealed - SpoilerTV
  19. Kevin Smith - Facebook
  20. KevinSmith (@ThatKevinSmith) - Twitter