Season 4 Episodes

Episode Guide

Think Fast

Season 4, Episode 22 - Air Date: 5/15/2018
From The CW: When DeVoe assaults an A.R.G.U.S. facility to complete his Enlightenment Machine, Barry (Grant Gustin) realizes the only way he can stop him is if he allows Cisco (Carlos Valdes) and Caitlin (Danielle Panabaker) to accompany him into the facility.
Episode Guide

Harry and the Harrisons

Season 4, Episode 21 - Air Date: 5/8/2018
From The CW: With DeVoe's Enlightenment device nearly complete, in order to disable it The Flash (Grant Gustin) and his team must put their faith in an unlikely ally - Amunet Black (guest star Kattee Sackhoff).
Episode Guide

Therefore She Is

Season 4, Episode 20 - Air Date: 5/1/2018
From The CW: Barry (Grant Gustin) and Team Flash team up with Gypsy (guest star Jessica Camacho) to try to thwart Thinker's plan.
Episode Guide

Fury Rogue

Season 4, Episode 19 - Air Date: 4/24/2018
From The CW: When Barry (Grant Gustin) needs help transporting a dangerous meta, he calls on a new friend for help - Leo Snart AKA Citizen Cold (guest star Wentworth Miller).
Episode Guide

Lose Yourself

Season 4, Episode 18 - Air Date: 4/17/2018
From The CW: When Barry (Grant Gustin) 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.
Episode Guide

Null and Annoyed

Season 4, Episode 17 - Air Date: 4/10/2018
From The CW: Barry (Grant Gustin) and Ralph (guest star Hartley Sawyer) take different approaches to finding the remaining bus metas before DeVoe gets to them.
Episode Guide

Run, Iris, Run

Season 4, Episode 16 - Air Date: 3/13/2018
From The CW: Team Flash confront a new bus meta, Matthew AKA Melting Pot (guest star Leonardo Nam), who has the ability to swap people's DNA.
Episode Guide

Enter Flashtime

Season 4, Episode 15 - Air Date: 3/6/2018
From The CW: When a nuclear bomb detonates in downtown Central City, Barry (Grant Gustin), Jesse Quick (guest star Violett Beane) and Jay Garrick (guest star John Wesley Shipp) slow down time by entering Flashtime.
Episode Guide

Subject 9

Season 4, Episode 14 - Air Date: 2/27/2018
From The CW: Barry (Grant Gustin) meets a powerful woman whose abilities could help him in his battle with DeVoe (guest star Sugar Lyn Beard).
Episode Guide

True Colors

Season 4, Episode 13 - Air Date: 2/6/2018
From The CW: After hearing that Amunet (guest star Katee Sackhoff) has struck a deal to buy all of the metahumans in Iron Heights, Barry (Grant Gustin) must decide if he should expose his powers in order to save his cellmates.
Episode Guide

Honey, I Shrunk Team Flash

Season 4, Episode 12 - Air Date: 1/30/2018
From The CW: A meta who can shrink anything he touches battles Team Flash. Cisco (Carlos Valdes) and Ralph (guest star Hartley Sawyer) get caught in his crossfire and are shrunk to miniature versions of themselves.
Episode Guide

The Elongated Knight Rises

Season 4, Episode 11 - Air Date: 1/23/2018
From The CW: When a familiar villain returns to terrorize Central City, Ralph (guest star Hartley Sawyer) must rise up to defend the innocent while Barry (Grant Gustin) is detained by his trial.
Episode Guide

The Trial of The Flash

Season 4, Episode 10 - Air Date: 1/16/2018
From The CW: As Barry's (Grant Gustin) trial for the murder of Clifford DeVoe begins, Iris (Candice Patton) and Joe (Jesse L.
Episode Guide

Don't Run

Season 4, Episode 9 - Air Date: 12/5/2017
From The CW: Amunet (guest star Katie Sackhoff) kidnaps Caitlin (Danielle Panabaker) and puts meta-dampener handcuffs on her to keep her from turning into Killer Frost.
Episode Guide

Crisis on Earth X, Part 3

Season 4, Episode 8 - Air Date: 11/28/2017
From The CW: Barry (Grant Gustin) and Iris's (Candice Patton) wedding brings the gang together, but things go awry when villains from Earth-X attack the ceremony.
Episode Guide

Therefore I Am

Season 4, Episode 7 - Air Date: 11/21/2017
From The CW: Barry (Grant Gustin) comes face to face with DeVoe (guest star Neil Sandilands). Devoe's past is revealed through flashbacks.
Episode Guide

When Harry Met Harry…

Season 4, Episode 6 - Air Date: 11/14/2017
From The CW: When collectors of Native American artifacts are attacked by a meta named Mina Chayton (guest star Chelsea Kurtz) who can bring inanimate objects to life, Barry (Grant Gustin) turns to a surprising ally for help.
Episode Guide

Girls Night Out

Season 4, Episode 5 - Air Date: 11/7/2017
From The CW: Having received an ominous threat from her old boss, Amunet (guest star Katee Sackhoff), Caitlin (Danielle Panabaker) fears that her past time as Killer Frost may be back to haunt her.
Episode Guide

Elongated Journey Into Night

Season 4, Episode 4 - Air Date: 10/31/2017
From The CW: Cisco (Carlos Valdes) is shocked when Gypsy's (guest star Jessica Camacho) father, Breacher (guest star Danny Trejo), shows up on Earth-1.
Episode Guide

Luck Be a Lady

Season 4, Episode 3 - Air Date: 10/24/2017
From The CW: Barry (Grant Gustin) and the team are hit by a string of bad luck and realize it is the handiwork of a new meta, Becky (guest star Sugar-Lyn Beard) nicknamed Hazard, who has the ability to give others bad luck, while cashing in the benefits for herself.
Episode Guide

Mixed Signals

Season 4, Episode 2 - Air Date: 10/17/2017
From The CW: Barry (Grant Gustin) has his hands full when he takes on a dangerous meta (guest star Dominic Burgess) who can control technology, while also confronting an obstacle in his personal life: the ramifications of abandoning Iris (Candice Patton) for six months to balance the Speed Force.
Episode Guide

The Flash Reborn

Season 4, Episode 1 - Air Date: 10/10/2017
From the CW: With Barry (Grant Gustin) in the speed force, Iris (Candice Patton), Kid Flash (Keiynan Lonsdale), Joe (Jesse L.