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The Flash Season 4 Episodes

23 Episodes 2017 - 2018

With Barry/The Flash (Grant Gustin) voluntarily committing himself to imprisonment in the Speed Force, Iris (Candice Patton) forcefully leads a discouraged Team Flash in protecting Central City. However, a new villain emerges and threatens to destroy the city if the Flash doesn't come out to fight him. Against Iris' wishes, the team brings Barry out of imprisonment, though Barry seems incapacitated by his stay in the Speed Force. Later, the team realizes that by getting Barry out of prison, they played right into the hands of their new enemy, the Thinker (Neil Sandilands). Season 4 of "The Flash" also stars Carlos Valdes as Cisco Ramon, Danielle Panabaker as Caitlin Snow, Jesse L. Martin as Joe West, Keiynan Lonsdale as Wally West, and Tom Cavanagh as Harrison Wells. Danielle Nicolet, Jessica Camacho, Hartley Sawyer, and Katee Sackhoff make recurring appearances as Cecile Horton, Gypsy, Ralph Dibny, and Amunet Black respectively.

Episode 1

The Flash Reborn

Tue, Oct 10, 2017 60 mins

Season 4 begins with a powerful armored villain threatening to level Central City if the Flash doesn't appear, so Cisco makes a risky decision to break Barry out of the speed force. But the Barry that comes out isn't the same Barry that went in.

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The Flash, Season 4 Episode 1 image

Episode 2

Mixed Signals

Tue, Oct 17, 2017 60 mins

Barry takes on a dangerous meta who can control technology and confronts an obstacle in his personal life: the ramifications of abandoning Iris for six months to balance the Speed Force. Meanwhile, Gypsy prepares for a hot date with Cisco, but she gets annoyed when his work keeps them apart.

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The Flash, Season 4 Episode 2 image

Episode 3

Luck Be a Lady

Tue, Oct 24, 2017 60 mins

Barry and the team are hit by a string of bad luck and realize it is the handiwork of a new meta 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.

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The Flash, Season 4 Episode 3 image

Episode 4

Elongated Journey Into Night

Tue, Oct 31, 2017 60 mins

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.

Where to Watch
The Flash, Season 4 Episode 4 image

Episode 5

Girls Night Out

Tue, Nov 7, 2017 60 mins

Caitlin receives an ominous threat from her old boss, Amunet, and fears her past time as Killer Frost may be back to haunt her. Meanwhile, Felicity comes to Central City to help the girls celebrate Iris' bachelorette party; and Cisco, Joe and the guys take Barry out for a night on the town.

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The Flash, Season 4 Episode 5 image

Episode 6

When Harry Met Harry...

Tue, Nov 14, 2017 60 mins

Barry turns to a surprising ally for help when collectors of Native American artifacts are attacked by a meta who can bring inanimate objects to life. Harry enlists Cisco's help to summon the ultimate think tank to crack the identity of the Thinker.

Where to Watch
The Flash, Season 4 Episode 6 image

Episode 7

Therefore I Am

Tue, Nov 21, 2017 60 mins

Barry comes face to face with DeVoe; and Devoe's past is revealed through flashbacks. Meanwhile, Iris puts the final touches on the wedding, which is a week away.

Where to Watch
The Flash, Season 4 Episode 7 image

Episode 8

Crisis on Earth-X, Part 3

Tue, Nov 28, 2017 60 mins

Part 3 of 4. 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 join forces 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.

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The Flash, Season 4 Episode 8 image

Episode 9

Don't Run

Tue, Dec 5, 2017 60 mins

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.

Where to Watch
The Flash, Season 4 Episode 9 image

Episode 10

The Trial of The Flash

Tue, Jan 16, 2018 60 mins

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.

Where to Watch
The Flash, Season 4 Episode 10 image

Episode 11

The Elongated Knight Rises

Tue, Jan 23, 2018 60 mins

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.

Where to Watch
The Flash, Season 4 Episode 11 image

Episode 12

Honey, I Shrunk Team Flash

Tue, Jan 30, 2018 60 mins

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.

Where to Watch
The Flash, Season 4 Episode 12 image

Episode 13

True Colors

Tue, Feb 6, 2018 60 mins

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.

Where to Watch
The Flash, Season 4 Episode 13 image

Episode 14

Subject 9

Tue, Feb 27, 2018 60 mins

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

Where to Watch
The Flash, Season 4 Episode 14 image

Episode 15

Enter Flashtime

Tue, Mar 6, 2018 60 mins

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.

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The Flash, Season 4 Episode 15 image

Episode 16

Run, Iris, Run

Tue, Mar 13, 2018 60 mins

Team Flash confront a new bus meta, Matthew AKA Melting Pot, who has the ability to swap people's DNA. During a battle with Team Flash, Matthew accidentally takes Barry's speed away and gives it to Iris. Now, with a new threat unleashed on Central City, Barry must act as the team leader while Iris takes on the mantle of superhero speedster in order to defeat their new foe.

Where to Watch
The Flash, Season 4 Episode 16 image

Episode 17

Null and Annoyed

Tue, Apr 10, 2018 60 mins

Barry and Ralph take different approaches to finding the remaining bus metas before DeVoe gets to them. However, Ralph's cavalier attitude frustrates Barry and the two clash over what it means to be a hero. Meanwhile, Breacher returns to ask Cisco for a favor.

Where to Watch
The Flash, Season 4 Episode 17 image

Episode 18

Lose Yourself

Tue, Apr 17, 2018 60 mins

When Barry and Team Flash find a way to enter The Thinker's lair, Ralph considers crossing a dangerous line to defeat DeVoe. Meanwhile, Joe is concerned by Harry's recent behavior.

Where to Watch
The Flash, Season 4 Episode 18 image

Episode 19

Fury Rogue

Tue, Apr 24, 2018 60 mins

When Barry needs help transporting a dangerous meta, he calls on a new friend for help—Leo Snart AKA Citizen Cold. Meanwhile, Cisco becomes suspicious of Harry.

Where to Watch
The Flash, Season 4 Episode 19 image

Episode 20

Therefore She Is

Tue, May 1, 2018 60 mins

Barry and Team Flash team up with Gypsy to try to thwart Thinker's plan. Meanwhile, Cisco and Gypsy have a heart-to-heart talk about their relationship.

Where to Watch
The Flash, Season 4 Episode 20 image

Episode 21

Harry and the Harrisons

Tue, May 8, 2018 60 mins

With DeVoe's Enlightenment device nearly complete, in order to disable it the Flash and his team must put their faith in an unlikely ally—Amunet Black. Meanwhile, Harry hits an all-time low.

Where to Watch
The Flash, Season 4 Episode 21 image

Episode 22

Think Fast

Tue, May 15, 2018 60 mins

When DeVoe assaults an A.R.G.U.S. facility to complete his Enlightenment Machine, Barry realizes the only way he can stop him is if he allows Cisco and Caitlin to accompany him into the facility. Still shaken by Ralph's death, Barry isn't sure he wants to risk any more of his friends' lives and considers taking on DeVoe solo.

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The Flash, Season 4 Episode 22 image

Episode 23

We Are the Flash

Tue, May 22, 2018 60 mins

In the Season 4 finale, Team Flash gets help from a surprising ally in their battle against DeVoe.

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The Flash, Season 4 Episode 23 image