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The Flash - S03E21 - Cause and Effect
 

Watch The Flash season 3 episode 21 Online

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.
 
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The Flash / S03E21 : Cause and Effect
Season 3, Episode 21 | Aired on May 9, 2017 | TV-PG | 42 min. | The CW
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EPISODES
Season 3
Season 3
Season 3
Season 9
Season 8
Season 7
Season 6
Season 5
Season 4
Season 3
Season 2
Season 1
Specials
 
 
  • The Flash - Episode 1 - Flashpoint
    Episode 1
    Flashpoint
  • The Flash - Episode 2 - Paradox
    Episode 2
    Paradox
  • The Flash - Episode 3 - Magenta
    Episode 3
    Magenta
  • The Flash - Episode 4 - The New Rogues
    Episode 4
    The New Rogues
  • The Flash - Episode 5 - Monster
    Episode 5
    Monster
  • The Flash - Episode 6 - Shade
    Episode 6
    Shade
  • The Flash - Episode 7 - Killer Frost
    Episode 7
    Killer Frost
  • The Flash - Episode 8 - Invasion! (2)
    Episode 8
    Invasion! (2)
  • The Flash - Episode 9 - The Present
    Episode 9
    The Present
  • The Flash - Episode 10 - Borrowing Problems from the Future
    Episode 10
    Borrowing Problems from the Future
  • The Flash - Episode 11 - Dead or Alive
    Episode 11
    Dead or Alive
  • The Flash - Episode 12 - Untouchable
    Episode 12
    Untouchable
  • The Flash - Episode 13 - Attack on Gorilla City (1)
    Episode 13
    Attack on Gorilla City (1)
  • The Flash - Episode 14 - Attack on Central City (2)
    Episode 14
    Attack on Central City (2)
  • The Flash - Episode 15 - The Wrath of Savitar
    Episode 15
    The Wrath of Savitar
  • The Flash - Episode 16 - Into the Speed Force
    Episode 16
    Into the Speed Force
  • The Flash - Episode 17 - Duet (2)
    Episode 17
    Duet (2)
  • The Flash - Episode 18 - Abra Kadabra
    Episode 18
    Abra Kadabra
  • The Flash - Episode 19 - The Once and Future Flash
    Episode 19
    The Once and Future Flash
  • The Flash - Episode 20 - I Know Who You Are
    Episode 20
    I Know Who You Are
  • The Flash - Episode 21 - Cause and Effect
    Episode 21
    Cause and Effect
  • The Flash - Episode 22 - Infantino Street
    Episode 22
    Infantino Street
  • The Flash - Episode 23 - Finish Line
    Episode 23
    Finish Line

The Flash season 3 episode 21 Recap and FAQ

icon

Episode Summary

Barry and Team Flash uncover that Savitar is actually a future version of Barry, a time remnant left feeling abandoned and turning evil. Tracy Brown is identified as key to trapping Savitar. An attempt to prevent Savitar from predicting their moves backfires, causing Barry to lose his memory, leading to unforeseen consequences like Wally losing his powers. Eventually, Barry's memories are restored through Iris's emotional recall. The team completes the Speed Force Bazooka to trap Savitar but faces the challenge of powering it, needing an energy source greater than the sun.

Full Episode S03E21 Recap

### Introduction to Savitar's Origin - **Barry and Team Flash learn Savitar's identity**: They discover Savitar is a future version of Barry, a time remnant created in the battle against Zoom, who was shunned by everyone and became vengeful. - **Tracy Brown's role**: She's identified as the key to creating a trap for Savitar, as her theories about the Speed Force are crucial. - **Caitlin's alliance with Savitar**: It's revealed that Caitlin, now as Killer Frost, is working with Savitar. ### Savitar's Confession - **Savitar explains his origin to Barry**: He shares his pain of being an outcast and how he decided to become a god to escape his suffering. - **Barry's struggle with his dark side**: Barry sees similarities between his pain and Savitar's, understanding how loss and pain fueled Savitar’s transformation. ### Barry's Amnesia - **Barry loses his memory**: In an attempt to stop Savitar from knowing their plans, Team Flash accidentally erases Barry's memories. - **Impact of Barry's memory loss**: This leads to complications, including Wally losing his powers as Kid Flash, since Savitar can’t remember giving them to him. - **Barry's life without burdens**: Without his traumatic memories, Barry is happier and carefree, leading Iris to ponder if this is the life he deserved. ### Restoring Barry's Memory - **Team Flash's efforts to restore Barry's memory**: Caitlin, still as Killer Frost, offers to help restore Barry's memory to regain Kid Flash's powers. - **Barry's memories return**: Triggered by a deep emotional recall from Iris, Barry regains his memories and reverts to his original self. ### Building the Speed Force Bazooka - **Tracy and H.R.'s progress**: They complete the Speed Force Bazooka, a device designed to trap Savitar. - **Power requirements for the bazooka**: The device needs an immense amount of energy, more than in the sun, to work effectively. ### Caitlin's Refusal to Return - **Caitlin's rejection of Team Flash**: Despite Julian's pleas, Caitlin declares she never loved them and fully embraces her Killer Frost persona. ### Conclusion - **The quest to stop Savitar continues**: With Barry's memory restored and the Speed Force Bazooka built, the team faces the challenge of finding a power source strong enough to operate it.

Frequently Asked Questions

Who is Savitar in the TV show "The Flash"?

Savitar is a future version of Barry Allen, a time remnant created during his battle against Zoom.

What role does Tracy Brown play in stopping Savitar?

Tracy Brown is crucial in creating a trap for Savitar, based on her theories about the Speed Force.

Why does Caitlin, as Killer Frost, ally with Savitar?

Caitlin allies with Savitar because she trusts him, as he shares Barry Allen's face.

How does Barry Allen lose his memory?

Barry loses his memory due to an accident by Team Flash, intended to prevent Savitar from knowing their plans.

What is the impact of Barry's memory loss on Kid Flash?

Kid Flash (Wally West) loses his powers because Savitar, who granted them, can't remember doing so due to Barry's memory loss.

How is Barry's memory eventually restored?

Barry's memory is restored through an emotional trigger provided by Iris, reminding him of a significant moment from their past.

What is the Speed Force Bazooka, and who created it?

The Speed Force Bazooka is a device designed to trap Savitar in the Speed Force, created by Tracy Brown and H.R.

Why does Caitlin refuse to return to Team Flash?

Caitlin refuses to return to Team Flash because she fully embraces her identity as Killer Frost and claims she never loved them.

What is the main challenge facing Team Flash at the end of the episode?

The main challenge is finding a power source strong enough to operate the Speed Force Bazooka to trap Savitar.

 
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