Find Movies & TV
Home
Live TV
On Demand
Discover
Explore
Movies & TV Shows
Most Popular
Leaving Soon
Categories
Action
Animation
Comedy
Crime
Documentary
Drama
En Español
Horror
Music
Romance
Sci-Fi
Thriller
Western
Explore
Browse Channels
Featured Channels
Crime 360
Nashville
FailArmy
Categories
Bingeworthy
Movies
True Crime
News
Sports
Reality
Classics
Adrenaline & Sci-Fi
Comedy
Daytime TV & Games
Explore
Food, Home & Culture
Kids & Family
En Español
Global
Music
Sign In
The Flash (2014)
Cause and Effect
Directed by
David McWhirter
TV-14
S3 • E21
May 9, 2017
42m
8.0
7.4
Add Show to Watchlist
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.
More
Where to Watch The Flash (2014) - S3 • E21
Netflix
Subscription
Netflix Standard with Ads
Subscription
Amazon Video
Buy $1.99
+3 more
Cast of Cause and Effect
Grant Gustin
Barry Allen / The Flash
Danielle Panabaker
Dr. Caitlin Snow / Killer Frost
Carlos Valdes
Cisco Ramon / Vibe
Keiynan Lonsdale
Wally West / Kid Flash
Tom Cavanagh
Harrison 'H.R.' Wells
Jesse L. Martin
Joe West
Tom Felton
Dr. Julian Albert
Candice Patton
Iris West
Danielle Nicolet
Cecile Horton
Richard Zeman
Lucius Coolidge / Heat Monger
Liam Hughes
Young Barry
Sasha Rojen
Young Iris
Tobin Bell
Savitar (voice) (uncredited)
Anne Dudek
Tracy Brand
Andre Tricoteux
Savitar
Ken Camroux-Taylor
Judge Hankerson
David McWhirter
Director
Lauren Certo
Writer
Judalina Neira
Writer
C. Kim Miles
Director Of Photography
The Flash (2014) - S3 • E21 Ratings & Reviews
Geek Girl Authority
Noetta Harjo
For the entire season, we have been dealing with the cause and effect of Flashpoint. I'm kind of ready to move on.
Black Nerd Problems
Ja-Quan Greene
The subtle foreshadowing game was on point.
IGN Movies
Jesse Schedeen
Such a breath of fresh air... It's no coincidence that the best Flash episodes this season have been the ones to fight back against the darkness and focus more on lighthearted comedy.
New York Magazine/Vulture
Angelica Jade Bastién
As much as I love witnessing Barry and Iris fall in love all over again, I also want to understand more about who she is on her own.
Screen Rant
Sarah Moran
But leave it to The Flash to hold on to a few surprises.
Syfy Wire
Trent Moore
We learned a whole lot about Savitar's origin this week, but it's still insanely confusing.
Collider
Carla Day
The amnesic Barry Allen was funny, I'll give the writers credit for that.
Entertainment Weekly
Chancellor Agard
I loved that HR and Tracy kissed in this episode. I found their entire flirty subplot incredibly charming.
Birth.Movies.Death.
Siddhant Adlakha
Where it's at right now feels like a necessary retrospective on both the recent darkness as well as the show's initial whimsical nature.
AV Club
Scott Von Doviak
It's a very meta episode, and I'm not talking about metahumans.
Take Plex everywhere
Watch free anytime, anywhere, on almost any device.
See the full list of supported devices
Home
Live TV
On Demand
Discover
