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The Flash S03E21 — Cause and Effect episode still
Episode Subtitles

The Flash (2014) S03E21 — Cause and Effect Subtitles

7.4 TMDB episode · 36 votes

Barry takes drastic measures to stop Savitar. Meanwhile, H.R. continues to push Tracy Brand to design the trap for Savitar and Killer Frost returns with an interesting proposal.

IMDb: tt5668440 · TMDB: 1307855

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Seasons & episodes

9 seasons · 184 episodes in the catalog

Season 123 episodes
The Flash S01E01 — City of Heroes episode still
Episode 1

City of Heroes

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The Flash S01E02 — Fastest Man Alive episode still
Episode 2

Fastest Man Alive

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The Flash S01E03 — Things You Can't Outrun episode still
Episode 3

Things You Can't Outrun

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The Flash S01E04 — Going Rogue episode still
Episode 4

Going Rogue

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The Flash S01E05 — Plastique episode still
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Plastique

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The Flash S01E06 — The Flash is Born episode still
Episode 6

The Flash is Born

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The Flash S01E07 — Power Outage episode still
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Power Outage

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The Flash S01E08 — Flash vs. Arrow (I) episode still
Episode 8

Flash vs. Arrow (I)

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The Flash S01E09 — The Man in the Yellow Suit episode still
Episode 9

The Man in the Yellow Suit

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The Flash S01E10 — Revenge of the Rogues episode still
Episode 10

Revenge of the Rogues

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The Flash S01E11 — The Sound and the Fury episode still
Episode 11

The Sound and the Fury

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The Flash S01E12 — Crazy for You episode still
Episode 12

Crazy for You

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The Flash S01E13 — The Nuclear Man episode still
Episode 13

The Nuclear Man

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The Flash S01E14 — Fallout episode still
Episode 14

Fallout

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The Flash S01E15 — Out of Time episode still
Episode 15

Out of Time

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The Flash S01E16 — Rogue Time episode still
Episode 16

Rogue Time

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The Flash S01E17 — Tricksters episode still
Episode 17

Tricksters

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The Flash S01E18 — All-Star Team Up episode still
Episode 18

All-Star Team Up

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The Flash S01E19 — Who Is Harrison Wells? episode still
Episode 19

Who Is Harrison Wells?

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The Flash S01E20 — The Trap episode still
Episode 20

The Trap

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The Flash S01E21 — Grodd Lives episode still
Episode 21

Grodd Lives

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The Flash S01E22 — Rogue Air episode still
Episode 22

Rogue Air

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The Flash S01E23 — Fast Enough episode still
Episode 23

Fast Enough

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Season 223 episodes
The Flash S02E01 — The Man Who Saved Central City episode still
Episode 1

The Man Who Saved Central City

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The Flash S02E02 — Flash of Two Worlds episode still
Episode 2

Flash of Two Worlds

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The Flash S02E03 — Family of Rogues episode still
Episode 3

Family of Rogues

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The Flash S02E04 — The Fury of Firestorm episode still
Episode 4

The Fury of Firestorm

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The Flash S02E05 — The Darkness and the Light episode still
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The Darkness and the Light

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The Flash S02E06 — Enter Zoom episode still
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Enter Zoom

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The Flash S02E07 — Gorilla Warfare episode still
Episode 7

Gorilla Warfare

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The Flash S02E08 — Legends of Today (I) episode still
Episode 8

Legends of Today (I)

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The Flash S02E09 — Running to Stand Still episode still
Episode 9

Running to Stand Still

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The Flash S02E10 — Potential Energy episode still
Episode 10

Potential Energy

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The Flash S02E11 — The Reverse-Flash Returns episode still
Episode 11

The Reverse-Flash Returns

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The Flash S02E12 — Fast Lane episode still
Episode 12

Fast Lane

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The Flash S02E13 — Welcome to Earth-2 episode still
Episode 13

Welcome to Earth-2

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The Flash S02E14 — Escape from Earth-2 episode still
Episode 14

Escape from Earth-2

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The Flash S02E15 — King Shark episode still
Episode 15

King Shark

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The Flash S02E16 — Trajectory episode still
Episode 16

Trajectory

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The Flash S02E17 — Flash Back episode still
Episode 17

Flash Back

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The Flash S02E18 — Versus Zoom episode still
Episode 18

Versus Zoom

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The Flash S02E19 — Back to Normal episode still
Episode 19

Back to Normal

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The Flash S02E20 — Rupture episode still
Episode 20

Rupture

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The Flash S02E21 — The Runaway Dinosaur episode still
Episode 21

The Runaway Dinosaur

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The Flash S02E22 — Invincible episode still
Episode 22

Invincible

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The Flash S02E23 — The Race of His Life episode still
Episode 23

The Race of His Life

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Season 323 episodes
The Flash S03E01 — Flashpoint episode still
Episode 1

Flashpoint

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The Flash S03E02 — Paradox episode still
Episode 2

Paradox

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The Flash S03E03 — Magenta episode still
Episode 3

Magenta

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The Flash S03E04 — The New Rogues episode still
Episode 4

The New Rogues

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The Flash S03E05 — Monster episode still
Episode 5

Monster

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The Flash S03E06 — Shade episode still
Episode 6

Shade

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The Flash S03E07 — Killer Frost episode still
Episode 7

Killer Frost

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The Flash S03E08 — Invasion! (II) episode still
Episode 8

Invasion! (II)

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The Flash S03E09 — The Present episode still
Episode 9

The Present

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The Flash S03E10 — Borrowing Problems From The Future episode still
Episode 10

Borrowing Problems From The Future

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The Flash S03E11 — Dead or Alive episode still
Episode 11

Dead or Alive

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The Flash S03E12 — Untouchable episode still
Episode 12

Untouchable

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The Flash S03E13 — Attack on Gorilla City episode still
Episode 13

Attack on Gorilla City

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The Flash S03E14 — Attack on Central City episode still
Episode 14

Attack on Central City

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The Flash S03E15 — The Wrath of Savitar episode still
Episode 15

The Wrath of Savitar

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The Flash S03E16 — Into the Speed Force episode still
Episode 16

Into the Speed Force

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The Flash S03E17 — Duet (II) episode still
Episode 17

Duet (II)

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The Flash S03E18 — Abra Kadabra episode still
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Abra Kadabra

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The Flash S03E19 — The Once and Future Flash episode still
Episode 19

The Once and Future Flash

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The Flash S03E20 — I Know Who You Are episode still
Episode 20

I Know Who You Are

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The Flash S03E21 — Cause and Effect episode still
Episode 21

Cause and Effect

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The Flash S03E22 — Infantino Street episode still
Episode 22

Infantino Street

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The Flash S03E23 — Finish Line episode still
Episode 23

Finish Line

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Season 423 episodes
The Flash S04E01 — The Flash Reborn episode still
Episode 1

The Flash Reborn

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The Flash S04E02 — Mixed Signals episode still
Episode 2

Mixed Signals

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The Flash S04E03 — Luck Be a Lady episode still
Episode 3

Luck Be a Lady

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The Flash S04E04 — Luck Be a Lady episode still
Episode 4

Luck Be a Lady

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The Flash S04E05 — Girls Night Out episode still
Episode 5

Girls Night Out

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The Flash S04E06 — When Harry Met Harry... episode still
Episode 6

When Harry Met Harry...

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The Flash S04E07 — Therefore I Am episode still
Episode 7

Therefore I Am

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The Flash S04E08 — Crisis on Earth-X (III) episode still
Episode 8

Crisis on Earth-X (III)

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The Flash S04E09 — Don't Run episode still
Episode 9

Don't Run

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The Flash S04E10 — The Trial of The Flash episode still
Episode 10

The Trial of The Flash

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The Flash S04E11 — The Elongated Knight Rises episode still
Episode 11

The Elongated Knight Rises

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The Flash S04E12 — Honey, I Shrunk Team Flash episode still
Episode 12

Honey, I Shrunk Team Flash

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The Flash S04E13 — True Colors episode still
Episode 13

True Colors

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The Flash S04E14 — Subject 9 episode still
Episode 14

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The Flash S04E15 — Enter Flashtime episode still
Episode 15

Enter Flashtime

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The Flash S04E16 — Run, Iris, Run episode still
Episode 16

Run, Iris, Run

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The Flash S04E17 — Null and Annoyed episode still
Episode 17

Null and Annoyed

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The Flash S04E18 — Lose Yourself episode still
Episode 18

Lose Yourself

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The Flash S04E19 — Fury Rogue episode still
Episode 19

Fury Rogue

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The Flash S04E20 — Therefore She Is episode still
Episode 20

Therefore She Is

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The Flash S04E21 — Harry and the Harrisons episode still
Episode 21

Harry and the Harrisons

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The Flash S04E22 — Think Fast episode still
Episode 22

Think Fast

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The Flash S04E23 — We Are The Flash episode still
Episode 23

We Are The Flash

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Season 521 episodes
The Flash S05E01 — Nora episode still
Episode 1

Nora

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The Flash S05E02 — Blocked episode still
Episode 2

Blocked

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The Flash S05E03 — The Death of Vibe episode still
Episode 3

The Death of Vibe

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The Flash S05E04 — News Flash episode still
Episode 4

News Flash

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The Flash S05E05 — All Doll'd Up episode still
Episode 5

All Doll'd Up

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The Flash S05E06 — The Icicle Cometh episode still
Episode 6

The Icicle Cometh

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The Flash S05E07 — O Come, All Ye Thankful episode still
Episode 7

O Come, All Ye Thankful

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The Flash S05E08 — What's Past Is Prologue episode still
Episode 8

What's Past Is Prologue

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The Flash S05E09 — Elseworlds (I) episode still
Episode 9

Elseworlds (I)

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The Flash S05E10 — The Flash & The Furious episode still
Episode 10

The Flash & The Furious

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The Flash S05E11 — Seeing Red episode still
Episode 11

Seeing Red

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The Flash S05E12 — Memorabilia episode still
Episode 12

Memorabilia

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The Flash S05E13 — Goldfaced episode still
Episode 13

Goldfaced

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The Flash S05E14 — Cause and XS episode still
Episode 14

Cause and XS

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The Flash S05E15 — King Shark vs. Gorilla Grodd episode still
Episode 15

King Shark vs. Gorilla Grodd

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The Flash S05E16 — Failure is an Orphan episode still
Episode 16

Failure is an Orphan

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The Flash S05E17 — Time Bomb episode still
Episode 17

Time Bomb

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The Flash S05E19 — Snow Pack episode still
Episode 19

Snow Pack

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The Flash S05E20 — Gone Rogue episode still
Episode 20

Gone Rogue

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The Flash S05E21 — The Girl With The Red Lightning episode still
Episode 21

The Girl With The Red Lightning

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The Flash S05E22 — Legacy episode still
Episode 22

Legacy

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Season 620 episodes
The Flash S06E01 — Into The Void episode still
Episode 1

Into The Void

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The Flash S06E02 — A Flash of the Lightning episode still
Episode 2

A Flash of the Lightning

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The Flash S06E03 — Dead Man Running episode still
Episode 3

Dead Man Running

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The Flash S06E04 — There Will Be Blood episode still
Episode 4

There Will Be Blood

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The Flash S06E05 — Kiss Kiss Breach Breach episode still
Episode 5

Kiss Kiss Breach Breach

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The Flash S06E06 — License to Elongate episode still
Episode 6

License to Elongate

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The Flash S06E07 — The Last Temptation of Barry Allen, Pt. 1 episode still
Episode 7

The Last Temptation of Barry Allen, Pt. 1

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The Flash S06E08 — The Last Temptation of Barry Allen, Pt. 2 episode still
Episode 8

The Last Temptation of Barry Allen, Pt. 2

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The Flash S06E09 — Crisis on Infinite Earths: Part Three (III) episode still
Episode 9

Crisis on Infinite Earths: Part Three (III)

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The Flash S06E10 — Marathon episode still
Episode 10

Marathon

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The Flash S06E11 — Love Is a Battlefield episode still
Episode 11

Love Is a Battlefield

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The Flash S06E12 — A Girl Named Sue episode still
Episode 12

A Girl Named Sue

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The Flash S06E13 — Grodd Friended Me episode still
Episode 13

Grodd Friended Me

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The Flash S06E14 — Death of the Speed Force episode still
Episode 14

Death of the Speed Force

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The Flash S06E15 — The Exorcism of Nash Wells episode still
Episode 15

The Exorcism of Nash Wells

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The Flash S06E16 — So Long and Goodnight episode still
Episode 16

So Long and Goodnight

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The Flash S06E17 — Liberation episode still
Episode 17

Liberation

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The Flash S06E18 — Pay the Piper episode still
Episode 18

Pay the Piper

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The Flash S06E18 — Pay the Piper episode still
Episode 18

Pay the Piper

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The Flash S06E19 — Success Is Assured episode still
Episode 19

Success Is Assured

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Season 718 episodes
The Flash S07E01 — All's Wells That Ends Wells episode still
Episode 1

All's Wells That Ends Wells

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The Flash S07E02 — The Speed of Thought episode still
Episode 2

The Speed of Thought

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The Flash S07E03 — Mother episode still
Episode 3

Mother

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The Flash S07E04 — Central City Strong episode still
Episode 4

Central City Strong

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The Flash S07E05 — Fear Me episode still
Episode 5

Fear Me

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The Flash S07E06 — The One With The Nineties episode still
Episode 6

The One With The Nineties

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The Flash S07E07 — Growing Pains episode still
Episode 7

Growing Pains

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The Flash S07E08 — The People V. Killer Frost episode still
Episode 8

The People V. Killer Frost

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The Flash S07E09 — Timeless episode still
Episode 9

Timeless

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The Flash S07E10 — Family Matters, Part 1 episode still
Episode 10

Family Matters, Part 1

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The Flash S07E11 — Family Matters, Pt. 2 episode still
Episode 11

Family Matters, Pt. 2

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The Flash S07E12 — Good-Bye Vibrations episode still
Episode 12

Good-Bye Vibrations

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The Flash S07E13 — Masquerade episode still
Episode 13

Masquerade

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The Flash S07E14 — Rayo de Luz episode still
Episode 14

Rayo de Luz

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The Flash S07E15 — Enemy at the Gates episode still
Episode 15

Enemy at the Gates

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The Flash S07E16 — P.O.W. episode still
Episode 16

P.O.W.

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The Flash S07E17 — Heart of the Matter (1) episode still
Episode 17

Heart of the Matter (1)

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The Flash S07E18 — Heart of the Matter (2) episode still
Episode 18

Heart of the Matter (2)

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Season 820 episodes
The Flash S08E01 — Armageddon (1) episode still
Episode 1

Armageddon (1)

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The Flash S08E02 — Armageddon (2) episode still
Episode 2

Armageddon (2)

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The Flash S08E03 — Armageddon (3) episode still
Episode 3

Armageddon (3)

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The Flash S08E04 — Armageddon (4) episode still
Episode 4

Armageddon (4)

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The Flash S08E05 — Armageddon (5) episode still
Episode 5

Armageddon (5)

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The Flash S08E06 — Impulsive Excessive Disorder episode still
Episode 6

Impulsive Excessive Disorder

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The Flash S08E07 — Lockdown episode still
Episode 7

Lockdown

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The Flash S08E08 — The Fire Next Time episode still
Episode 8

The Fire Next Time

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The Flash S08E09 — Phantoms episode still
Episode 9

Phantoms

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The Flash S08E10 — Reckless episode still
Episode 10

Reckless

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The Flash S08E11 — Resurrection episode still
Episode 11

Resurrection

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The Flash S08E12 — Death Rises episode still
Episode 12

Death Rises

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The Flash S08E13 — Death Falls episode still
Episode 13

Death Falls

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The Flash S08E14 — Funeral for a Friend episode still
Episode 14

Funeral for a Friend

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The Flash S08E15 — Into the Still Force episode still
Episode 15

Into the Still Force

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The Flash S08E16 — The Curious Case of Bartholomew Allen episode still
Episode 16

The Curious Case of Bartholomew Allen

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The Flash S08E17 — Keep It Dark episode still
Episode 17

Keep It Dark

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The Flash S08E18 — The Man in the Yellow Tie episode still
Episode 18

The Man in the Yellow Tie

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The Flash S08E19 — Negative (1) episode still
Episode 19

Negative (1)

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The Flash S08E20 — Negative (2) episode still
Episode 20

Negative (2)

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Season 913 episodes
The Flash S09E01 — Wednesday Ever After episode still
Episode 1

Wednesday Ever After

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The Flash S09E02 — Hear No Evil episode still
Episode 2

Hear No Evil

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The Flash S09E03 — Rogues of War episode still
Episode 3

Rogues of War

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The Flash S09E04 — Mask of the Red Death (1) episode still
Episode 4

Mask of the Red Death (1)

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The Flash S09E05 — Mask of the Red Death (2) episode still
Episode 5

Mask of the Red Death (2)

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The Flash S09E06 — The Good, the Bad and the Lucky episode still
Episode 6

The Good, the Bad and the Lucky

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The Flash S09E07 — Wildest Dreams episode still
Episode 7

Wildest Dreams

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The Flash S09E08 — Partners in Time episode still
Episode 8

Partners in Time

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The Flash S09E09 — It's My Party and I'll Die If I Want To episode still
Episode 9

It's My Party and I'll Die If I Want To

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The Flash S09E10 — A New World (1) episode still
Episode 10

A New World (1)

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The Flash S09E11 — A New World: The Blues (2) episode still
Episode 11

A New World: The Blues (2)

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The Flash S09E12 — A New World: Changes (3) episode still
Episode 12

A New World: Changes (3)

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The Flash S09E13 — A New World: Finale (4) episode still
Episode 13

A New World: Finale (4)

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