Title Airs On

S4:E1 The Flash Reborn

CW's The Flash
10/10/2017 08:00 pm EDT

Barry is brought out of the Speed Force to help fight an armored villain, but he isn't the same person.

S4:E2 Mixed Signals

CW's The Flash
10/17/2017 08:00 pm EDT

Barry deals with the ramifications of abandoning Iris while facing a meta who can control technology.

S4:E3 Luck Be a Lady

CW's The Flash
10/24/2017 08:00 pm EDT

A new meta called Hazard causes bad luck for Barry and the team, while Harry Wells returns to Earth-1 with a message for Wally ...read more A new meta called Hazard causes bad luck for Barry and the team, while Harry Wells returns to Earth-1 with a message for Wally from Jesse. show less

S4:E4 Elongated Journey Into Night

CW's The Flash
10/31/2017 08:00 pm EDT

Gypsy's father shows up on Earth-1 and decides to hunt Cisco.

S4:E5 Girls Night Out

CW's The Flash
11/07/2017 08:00 pm EST

Having received an ominous threat from her old boss, Amunet, Caitlin fears that her past time as Killer Frost may be back to ...read more 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. show less

S4:E6 When Harry Met Harry

CW's The Flash
11/14/2017 08:00 pm EST

S4:E7 Therefore I Am

CW's The Flash
11/21/2017 08:00 pm EST

Barry comes face to face with DeVoe. Devoe’s past is revealed through flashbacks. Meanwhile, Iris puts the final touches on ...read more 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. show less

S4:E8 Crisis On Earth-X, Part 3

CW's The Flash
11/28/2017 08:00 pm EST

Barry and Iris’s wedding brings the gang together, but things go awry when villains from Earth-X attack the ceremony. All of ...read more 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. show less

S4:E9 Don't Run

CW's The Flash
12/05/2017 02:24 pm EST

Amunet kidnaps Caitlin and puts meta-dampener handcuffs on her to keep her from turning into Killer Frost. Amunet tells Caitlin ...read more 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. show less

S4:E10 The Trial of the Flash

CW's The Flash
01/16/2018 08:00 pm EST

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 ...read more 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. show less

S4:E11 The Elongated Knight Rises

CW's The Flash
01/23/2018 08:00 pm EST

When a familiar villain returns to terrorize Central City, Ralph must rise up to defend the innocent while Barry is detained by ...read more 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. show less

S4:E12 Honey, I Shrunk Team Flash

CW's The Flash
01/30/2018 08:00 pm EST

A meta who can shrink anything he touches battles Team Flash. Cisco and Ralph get caught in his crossfire and are shrunk to ...read more 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. show less

S4:E13 True Colors

CW's The Flash
02/06/2018 08:00 pm EST

After hearing that Amunet has struck a deal to buy all of the metahumans in Iron Heights, Barry must decide if he should expose ...read more 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. show less

S4:E14 Subject 9

CW's The Flash
02/27/2018 08:00 pm EST

Barry meets a powerful woman whose abilities could help him in his battle with DeVoe. Meanwhile, after learning that DeVoe is ...read more 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. show less

S4:E15 Enter Flashtime

CW's The Flash
03/06/2018 08:00 pm EST

When a nuclear bomb detonates in downtown Central City, Barry, Jesse Quick and Jay Garrick slow down time by entering Flashtime. ...read more 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. show less

S4:E16 Run Iris, Run

CW's The Flash
03/13/2018 08:00 pm EDT

Team Flash confront a new bus meta, Matthew AKA Melting Pot, who has the ability to swap people’s DNA. During a battle with ...read more 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. show less

S4:E17 Null and Annoyed

CW's The Flash
04/10/2018 08:00 pm EDT

S4:E18 Lose Yourself

CW's The Flash
04/17/2018 08:00 pm EDT

When Barry and Team Flash find a way to enter The Thinker’s lair, Ralph (guest star Hartley Sawyer) considers crossing a ...read more When Barry and Team Flash find a way to enter The Thinker’s lair, Ralph (guest star Hartley Sawyer) considers crossing a dangerous line to defeat DeVoe. Meanwhile, Joe is concerned by Harry’s recent behavior. show less

S4:E19 Fury Rogue

CW's The Flash
04/24/2018 08:00 pm EDT

When Barry needs help transporting a dangerous meta, he calls on a new friend for help – Leo Snart AKA Citizen Cold (guest ...read more When Barry needs help transporting a dangerous meta, he calls on a new friend for help – Leo Snart AKA Citizen Cold (guest star Wentworth Miller). Meanwhile, Cisco becomes suspicious of Harry. show less

S4:E20 Therefore She Is

CW's The Flash
05/01/2018 08:00 pm EDT

Barry and Team Flash team up with Gypsy to try to thwart Thinker's plan. Meanwhile, Cisco and Gypsy have a heart to heart ...read more 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. show less

S4:E21 Harry and the Harrisons

CW's The Flash
05/08/2018 08:00 pm EDT

With DeVoe's Enlightenment device nearly complete, in order to disable it The Flash and his team must put their faith in an ...read more 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 when the "Council of Wells" kicks him out but then Cisco introduces him to the "Council of Harrisons." show less

S4:E22 Think Fast

CW's The Flash
05/15/2018 08:00 pm EDT

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 ...read more 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. show less

S4:E23 We Are the Flash

CW's The Flash
05/22/2018 08:00 pm EDT

Team Flash gets help from a surprising ally in their battle against DeVoe.