S03E21: Cause and Effect
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.
Previous Episode 
Season 1
Pilot
S1E1 / 07 Oct 2014
Fastest Man Alive
S1E2 / 14 Oct 2014
Things You Can't Outrun
S1E3 / 21 Oct 2014
Going Rogue
S1E4 / 28 Oct 2014
Plastique
S1E5 / 11 Nov 2014
The Flash is Born
S1E6 / 18 Nov 2014
Power Outage
S1E7 / 25 Nov 2014
Flash vs. Arrow (I)
S1E8 / 02 Dec 2014
The Man in the Yellow Suit
S1E9 / 09 Dec 2014
Revenge of the Rogues
S1E10 / 20 Jan 2015
The Sound and the Fury
S1E11 / 27 Jan 2015
Crazy for You
S1E12 / 03 Feb 2015
The Nuclear Man
S1E13 / 10 Feb 2015
Fallout
S1E14 / 17 Feb 2015
Out of Time
S1E15 / 17 Mar 2015
Rogue Time
S1E16 / 24 Mar 2015
Tricksters
S1E17 / 31 Mar 2015
All Star Team Up
S1E18 / 14 Apr 2015
Who Is Harrison Wells?
S1E19 / 21 Apr 2015
The Trap
S1E20 / 28 Apr 2015
Grodd Lives
S1E21 / 05 May 2015
Rogue Air
S1E22 / 12 May 2015
Fast Enough
S1E23 / 19 May 2015
Season 2
The Man Who Saved Central City
S2E1 / 06 Oct 2015
Flash of Two Worlds
S2E2 / 13 Oct 2015
Family of Rogues
S2E3 / 20 Oct 2015
The Fury of Firestorm
S2E4 / 27 Oct 2015
The Darkness and the Light
S2E5 / 03 Nov 2015
Enter Zoom
S2E6 / 10 Nov 2015
Gorilla Warfare
S2E7 / 17 Nov 2015
Legends of Today (I)
S2E8 / 01 Dec 2015
Running to Stand Still
S2E9 / 08 Dec 2015
Potential Energy
S2E10 / 19 Jan 2016
The Reverse-Flash Returns
S2E11 / 26 Jan 2016
Fast Lane
S2E12 / 02 Feb 2016
Welcome to Earth-2
S2E13 / 09 Feb 2016
Escape from Earth-2
S2E14 / 16 Feb 2016
King Shark
S2E15 / 23 Feb 2016
Trajectory
S2E16 / 22 Mar 2016
Flash Back
S2E17 / 29 Mar 2016
Versus Zoom
S2E18 / 19 Apr 2016
Back to Normal
S2E19 / 26 Apr 2016
Rupture
S2E20 / 03 May 2016
The Runaway Dinosaur
S2E21 / 10 May 2016
Invincible
S2E22 / 17 May 2016
The Race of His Life
S2E23 / 24 May 2016
Season 3
Flashpoint
S3E1 / 04 Oct 2016
Paradox
S3E2 / 11 Oct 2016
Magenta
S3E3 / 18 Oct 2016
The New Rogues
S3E4 / 25 Oct 2016
Monster
S3E5 / 01 Nov 2016
Shade
S3E6 / 15 Nov 2016
Killer Frost
S3E7 / 22 Nov 2016
Invasion! (II)
S3E8 / 29 Nov 2016
The Present
S3E9 / 06 Dec 2016
Borrowing Problems from the Future
S3E10 / 24 Jan 2017
Dead or Alive
S3E11 / 31 Jan 2017
Untouchable
S3E12 / 07 Feb 2017
Attack on Gorilla City (1)
S3E13 / 21 Feb 2017
Attack on Central City (2)
S3E14 / 28 Feb 2017
The Wrath of Savitar
S3E15 / 07 Mar 2017
Into the Speed Force
S3E16 / 14 Mar 2017
Duet (II)
S3E17 / 21 Mar 2017
Abra Kadabra
S3E18 / 28 Mar 2017
The Once and Future Flash
S3E19 / 25 Apr 2017
I Know Who You Are
S3E20 / 02 May 2017
Cause and Effect
S3E21 / 09 May 2017
Infantino Street
S3E22 / 16 May 2017
Finish Line
S3E23 / 23 May 2017
Season 4
The Flash Reborn
S4E1 / 10 Oct 2017
Mixed Signals
S4E2 / 17 Oct 2017
Luck Be a Lady
S4E3 / 24 Oct 2017
Elongated Journey Into Night
S4E4 / 31 Oct 2017
Girls Night Out
S4E5 / 07 Nov 2017
When Harry Met Harry...
S4E6 / 14 Nov 2017
Therefore I Am
S4E7 / 21 Nov 2017
Crisis on Earth-X (III)
S4E8 / 28 Nov 2017
Don't Run
S4E9 / 05 Dec 2017
The Trial of The Flash
S4E10 / 16 Jan 2018
The Elongated Knight Rises
S4E11 / 23 Jan 2018
Honey, I Shrunk Team Flash
S4E12 / 30 Jan 2018
True Colors
S4E13 / 06 Feb 2018
Subject 9
S4E14 / 27 Feb 2018
Enter Flashtime
S4E15 / 06 Mar 2018
Run, Iris, Run
S4E16 / 13 Mar 2018
Null and Annoyed
S4E17 / 10 Apr 2018
Lose Yourself
S4E18 / 17 Apr 2018
Fury Rogue
S4E19 / 24 Apr 2018
Therefore She Is
S4E20 / 01 May 2018
Harry and the Harrisons
S4E21 / 08 May 2018
Think Fast
S4E22 / 15 May 2018
We Are The Flash
S4E23 / 22 May 2018
Season 5
Nora
S5E1 / 09 Oct 2018
Blocked
S5E2 / 16 Oct 2018
The Death of Vibe
S5E3 / 23 Oct 2018
News Flash
S5E4 / 30 Oct 2018
All Doll'd Up
S5E5 / 13 Nov 2018
The Icicle Cometh
S5E6 / 20 Nov 2018
O Come, All Ye Thankful
S5E7 / 27 Nov 2018
What's Past Is Prologue
S5E8 / 04 Dec 2018
Elseworlds (I)
S5E9 / 09 Dec 2018
The Flash & The Furious
S5E10 / 15 Jan 2019
Seeing Red
S5E11 / 22 Jan 2019
Memorabilia
S5E12 / 29 Jan 2019
Goldfaced
S5E13 / 05 Feb 2019
Cause and XS
S5E14 / 12 Feb 2019
King Shark vs. Gorilla Grodd
S5E15 / 05 Mar 2019
Failure Is an Orphan
S5E16 / 12 Mar 2019
Time Bomb
S5E17 / 19 Mar 2019
Godspeed
S5E18 / 16 Apr 2019
Snow Pack
S5E19 / 23 Apr 2019
Gone Rogue
S5E20 / 30 Apr 2019
The Girl With The Red Lightning
S5E21 / 07 May 2019
Legacy
S5E22 / 14 May 2019
Season 6
Into The Void
S6E1 / 08 Oct 2019
A Flash of the Lightning
S6E2 / 15 Oct 2019
Dead Man Running
S6E3 / 22 Oct 2019
There Will Be Blood
S6E4 / 29 Oct 2019
Kiss Kiss Breach Breach
S6E5 / 05 Nov 2019
License to Elongate
S6E6 / 19 Nov 2019
The Last Temptation of Barry Allen (1)
S6E7 / 26 Nov 2019
The Last Temptation of Barry Allen (2)
S6E8 / 03 Dec 2019
Crisis on Infinite Earths: Part Three (III)
S6E9 / 10 Dec 2019
Marathon
S6E10 / 04 Feb 2020
Love Is a Battlefield
S6E11 / 11 Feb 2020
A Girl Named Sue
S6E12 / 18 Feb 2020
Grodd Friended Me
S6E13 / 25 Feb 2020
Death of the Speed Force
S6E14 / 10 Mar 2020
The Exorcism of Nash Wells
S6E15 / 17 Mar 2020
So Long and Goodnight
S6E16 / 21 Apr 2020
Liberation
S6E17 / 28 Apr 2020
Pay the Piper
S6E18 / 05 May 2020
Success Is Assured
S6E19 / 12 May 2020
Season 7
All's Wells That Ends Wells
S7E1 / 02 Mar 2021
The Speed of Thought
S7E2 / 09 Mar 2021
Mother
S7E3 / 16 Mar 2021
Central City Strong
S7E4 / 23 Mar 2021
Fear Me
S7E5 / 30 Mar 2021
The One With The Nineties
S7E6 / 06 Apr 2021
Growing Pains
S7E7 / 13 Apr 2021
The People v. Killer Frost
S7E8 / 04 May 2021
Timeless
S7E9 / 11 May 2021
Family Matters (1)
S7E10 / 18 May 2021
Family Matters (2)
S7E11 / 25 May 2021
Good-Bye Vibrations
S7E12 / 08 Jun 2021
Masquerade
S7E13 / 15 Jun 2021
Rayo De Luz
S7E14 / 22 Jun 2021
Enemy at the Gates
S7E15 / 29 Jun 2021
P.O.W.
S7E16 / 06 Jul 2021
Heart of the Matter (1)
S7E17 / 13 Jul 2021
Heart of the Matter (2)
S7E18 / 20 Jul 2021
Season 8
Armageddon (1)
S8E1 / 16 Nov 2021
Armageddon (2)
S8E2 / 23 Nov 2021
Armageddon (3)
S8E3 / 30 Nov 2021
Armageddon (4)
S8E4 / 07 Dec 2021
Armageddon (5)
S8E5 / 14 Dec 2021
Impulsive Excessive Disorder
S8E6 / 09 Mar 2022
Lockdown
S8E7 / 16 Mar 2022
The Fire Next Time
S8E8 / 23 Mar 2022
Phantoms
S8E9 / 30 Mar 2022
Reckless
S8E10 / 06 Apr 2022
Resurrection
S8E11 / 13 Apr 2022
Death Rises
S8E12 / 27 Apr 2022
Death Falls
S8E13 / 04 May 2022
Funeral for a Friend
S8E14 / 11 May 2022
Into the Still Force
S8E15 / 18 May 2022
The Curious Case of Bartholomew Allen
S8E16 / 25 May 2022
Keep It Dark
S8E17 / 08 Jun 2022
The Man in the Yellow Tie
S8E18 / 15 Jun 2022
Negative (1)
S8E19 / 22 Jun 2022
Negative (2)
S8E20 / 29 Jun 2022
Season 9
Wednesday Ever After
S9E1 / 08 Feb 2023
Hear No Evil
S9E2 / 15 Feb 2023
Rogues of War
S9E3 / 22 Feb 2023
Mask of the Red Death (1)
S9E4 / 01 Mar 2023
Mask of the Red Death (2)
S9E5 / 08 Mar 2023
The Good, the Bad and the Lucky
S9E6 / 15 Mar 2023
Wildest Dreams
S9E7 / 29 Mar 2023
Partners in Time
S9E8 / 05 Apr 2023
It's My Party and I'll Die If I Want To
S9E9 / 26 Apr 2023
A New World (1)
S9E10 / 03 May 2023
A New World (2)
S9E11 / 10 May 2023
A New World (3)
S9E12 / 17 May 2023
A New World (4)
S9E13 / 24 May 2023
Grant Gustin
Barry Allen / The Flash
Candice Patton
Iris West-Allen
Danielle Panabaker
Khione
Danielle Nicolet
Cecile Horton
Kayla Compton
Allegra Garcia
Brandon McKnight
Chester P. Runk
