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Season guide

The Flash: Season 3

23 episodes Premiered Oct 3, 2016 Updated Oct 1, 2026

The Flash Season 3 continues the overarching saga across 23 episodes. The series follows Barry Allen, portrayed by Grant Gustin, a crime scene investigator who gains superhuman speed after being struck by lightning and a freak accident. Created by Greg Berlanti, Geoff Johns, and Andrew Kreisberg, the drama and sci-fi and fantasy series follows Barry as he uses his powers to solve crimes. The American action televisio

Previously on The Flash

Season 3 Lore Primer

Key plot threads, lore context, and character stakes you need to remember before diving into this season.

  • ⚡ Barry Allen is a crime scene investigator who awakens from a nine-month coma after being struck by lightning.
  • ⚡ A freak accident grants Barry Allen superhuman speed, which he uses to solve crimes.
  • ⚡ Barry Allen is portrayed by actor Grant Gustin in the series.
  • ⚡ The series was created by Greg Berlanti, Geoff Johns, and Andrew Kreisberg.
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Season overview

The Flash Season 3 continues the overarching saga across 23 episodes. The series follows Barry Allen, portrayed by Grant Gustin, a crime scene investigator who gains superhuman speed after being struck by lightning and a freak accident. Created by Greg Berlanti, Geoff Johns, and Andrew Kreisberg, the drama and sci-fi and fantasy series follows Barry as he uses his powers to solve crimes. The American action television series is based on DC Comics characters and premiered on The CW in the United States, running for nine seasons from October 7, 2014, until May 24, 2023. The cast includes Grant Gustin, Candice Patton, Danielle Panabaker, and Jesse. Following his awakening from a nine-month coma after the lightning strike, the fastest man alive navigates his new reality while utilizing his abilities as a crime scene investigator and superhero.

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Season 3 Episodes

Episode Guide

🛡️ SPOILER SHIELD

Season 3 Progress Shield

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Binge Efficiency Engine

Season 3: Filler vs. Essential Canon

Filter episodes by narrative weight. Focus on essential mytharc and skip standalone side quests.

26%
74%
Mytharc (6): Crucial lore & season climaxes
Core (17): Character development & subplots
Side Quest (0): Standalone / filler
S3·E1 Mytharc

Flashpoint

Oct 4, 2016 · 42 min

Barry is living his dream life – his parents are alive, he’s asked Iris West on a date and he can finally be a normal guy as Central City has another speedster, Kid Flash, running

S3·E2 Core

Paradox

Oct 11, 2016 · 42 min

Barry realizes the effects from Flashpoint are much greater than he thought. Meanwhile, Barry meets new co-worker Julian Albert and is surprised by Julian's immediate disdain for h

S3·E3 Core

Magenta

Oct 18, 2016 · 42 min

Barry and Team Flash are thrilled to reunite with Earth-2 Wells and Jesse. Wells confides to Barry and Caitlin that Jesse has all the powers of a speedster and has been saving

S3·E4 Core

The New Rogues

Oct 25, 2016 · 42 min

Barry continues to train Jesse and when a new meta human, Mirror Master, appears on the scene he lets her tag along. Mirror Master has teamed up with his old partner, Top, and is l

S3·E5 Core

Monster

Nov 1, 2016 · 42 min

Caitlin goes to her mother to help understand the meta-human powers growing inside her. Meanwhile Barry tries to convince Julian to allow him to help investigate a new human meta-a

S3·E6 Core

Shade

Nov 15, 2016 · 42 min

When Wally starts having dreams about being Kid Flash, Barry realizes he has to tell Wally, Iris and Joe about what happened to Wally in Flashpoint in order to keep him safe.

S3·E7 Core

Killer Frost

Nov 22, 2016 · 42 min

Caitlin uses her powers to save Barry but as her mother predicted, the effort unleashes her inner Killer Frost. Killer Frost goes on a rampage looking for Dr. Alchemy, kidnapping J

S3·E8 Core

Invasion! (II)

Nov 29, 2016 · 41 min

When aliens called the Dominators attack Central City, Barry speeds over to Star City to ask the Green Arrow for help in stopping them. Realizing the battle against the Dominators

S3·E9 Mytharc

The Present

Dec 6, 2016 · 41 min

With Alchemy and Savitar still looming threats, Barry is unable to focus on the Christmas holiday, and especially his relationship with Iris. Determined to stop Savitar, Barry goes

S3·E10 Mytharc

Borrowing Problems from the Future

Jan 24, 2017 · 42 min

Barry is tormented by his vision of the future where Iris is murdered by Savitar. When a criminal named Plunder shows up in Central City, Barry recalls the villain’s presence in hi

S3·E11 Core

Dead or Alive

Jan 31, 2017 · 42 min

H.R.'s past catches up with him when a bounty hunter with vibe powers named Gypsy arrives in Central City to bring him back to Earth-19 to stand trial for his crime. It turns out i

S3·E12 Core

Untouchable

Feb 7, 2017 · 42 min

Barry and the team at S.T.A.R. Labs work together to bring down Clive Yorkin, a criminal meta-human who is methodically killing people by causing them to decompose at an accelerate

S3·E13 Core

Attack on Gorilla City (1)

Feb 21, 2017 · 42 min

When Jesse Quick informs the team that her father has been abducted, Barry, Caitlin, Cisco and Julian voyage to Earth-2 on a rescue mission to save Harry from Gorilla City. As they

S3·E14 Core

Attack on Central City (2)

Feb 28, 2017 · 42 min

When Grodd and his army of gorillas bring the battle to Earth-1, The Flash and team must find a way to stop them before they destroy Central City. Gypsy returns to join the fight.

S3·E15 Core

The Wrath of Savitar

Mar 7, 2017 · 42 min

While training with Barry, Wally starts to have visions of Savitar, which he hides from the team. A dangerous secret threatens Barry and Iris’ happiness.

S3·E16 Core

Into the Speed Force

Mar 14, 2017 · 41 min

Desperate to stop Savitar and save his friends, Barry turns to the Speed Force for answers. H.R. gives Jesse some advice.

S3·E17 Core

Duet (II)

Mar 21, 2017 · 43 min

Barry and team are surprised when Mon-El and Hank Henshaw arrive on their Earth carrying a comatose Supergirl who was whammied by the Music Meister. Unable to wake her up, they tur

S3·E18 Core

Abra Kadabra

Mar 28, 2017 · 42 min

The Flash fights a villain from Earth-19 called Abra Kadabra, who offers to reveal Savitar's identity in exchange for his release.

S3·E19 Mytharc

The Once and Future Flash

Apr 25, 2017 · 42 min

Barry travels to the future to find out Savitar’s still unknown identity in the hopes of saving Iris. Upon his arrival in 2024, Barry encounters future versions of his Team Flash

S3·E20 Core

I Know Who You Are

May 2, 2017 · 42 min

Barry and the team meet Tracy Brand, a scientist, who may be the key to stopping Savitar. Unfortunately, Killer Frost is also after Tracy so Team Flash must battle their old friend

S3·E21 Core

Cause and Effect

May 9, 2017 · 42 min

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.

S3·E22 Mytharc

Infantino Street

May 16, 2017 · 42 min

With only 24 hours left until Savitar murders Iris, Barry struggles to save the woman he loves and makes the choice to use any means necessary to do so. Realizing he has one option

S3·E23 Mytharc

Finish Line

May 23, 2017 · 41 min

With nothing left to lose, Barry takes on Savitar.

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