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The Flash: Flash Back

To gain enough speed to beat Zoom, Barry travels one year into the past to learn from Reverse Flash how to go faster. However, Harrison--Eobard Thawne--soon realizes who Barry is and threatens to kill Barry when he realizes that his future isn't so hopeful.

Episode Info  

Episode number: 2x17
Production Number: 3J5667/T2712667
Airdate: Tuesday March 29th, 2016

Alternate Airdates:

UK (sky 1) Apr 19, 2016

Special Guest Stars
Rick CosnettRick Cosnett
As Detective Eddie Thawne

Guest Stars
Andy MientusAndy Mientus
As Hartley Rathaway / Pied Piper

Co-Guest Stars
Main Cast
Grant GustinGrant Gustin
As Barry Allen / The Flash
Candice PattonCandice Patton
As Iris West
Danielle PanabakerDanielle Panabaker
As Caitlin Snow
Carlos ValdésCarlos Valdés
As Cisco Ramon
Keiynan LonsdaleKeiynan Lonsdale
As Wally West
Jesse L. MartinJesse L. Martin
As Detective Joe West
Thomas CavanaghThomas Cavanagh
As Harrison Wells
Rick CosnettRick Cosnett
As Detective Eddie Thawne


Barry speed-reads and blames himself for trusting Jay like he's trusted his Harrison to teach him how to run faster. He tries to figure out how to improve his speed so that he can stop Zoom. As Cisco comes in, he has a vibe from Jay's helmet of Zoom threatening to kill someone. He has all books related to increasing speed, and Caitlin comes in and says that all three speedsters--Flash, Reverse Flash, and Zoom—all move their legs at the same. However, they spend less time touching the ground when they run. Caitlin suggests that Barry can't run as fast as Zoom is because he can't...

Read the full recap
Episode Quotes
Caitlin: I think I found something interesting.
Cisco: Good interesting or bad interesting? 'Cause that word could go either way.

Harry: Although it turns out it's easier to find a two-ton gorilla on this earth than a teenage daughter.

Barry: Sometimes the only way to move forward is to revisit the things in your past that were holding you back. You have to deal with them head on no matter how scary they may be. Because once you do, you'll see that you can go further than you ever imagined.

Cultural References
Cisco: Or else you might set off some kind of 12 Monkeys time loop you'll never get out of.

In the 1995 science fiction movie 12 Monkeys, Bruce Willis' character travels into the past of 1995, ends up in 1990, and everyone assumes that he's insane when he talks about time travel. The movie was made into a Syfy TV series in 2015.

Cisco: Trying to go all Mission: Impossible on us?

Mission Impossible was a hit show in the 60s and early 70s, and inspired a hit movie starring Tom Cruise. It featured American superspies using advanced technology, often hidden, to perform their missions.

Cisco: Oh, you know, just trying to figure out how to find this Dementor that's apparently roaming through Central City right now.

The Dementors are wraith-like creatures in the Harry Potter novels written by J.K. Rowling. They are the guardians of the prison Azkaban, and can suck out emotions and even the souls of their victims.

Hartley: Holy Harry Potter.

Harry Potter is the boy wizard in the seven J.K. Rowling novels that spawned eight successful movies. Initially a novice mage, Harry develops to become one of the most powerful wizards of his generation and battles the evil Lord Voldemort.

Past-Barry: Dude, okay, I've watched Wrath of Khan with you like five times.

The second Star Trek movie, The Wrath of Khan (1982), features Kirk and his crew taking on a nemesis from the original series. It ends with Spock telling Kirk, "I have been, and always will be, your friend."

Cisco: Have you ever seen The Frighteners?

The Frighteners is a 1996 comedy-horror movie about a man who can talk with ghosts. He befriends three ghosts and they setup a fake exorcism business.

Other Episode Crew

DeveloperGeoff Johns  |  Greg Berlanti  |  Andrew Kreisberg
Executive ProducerTodd Helbing  |  Aaron Helbing  |  Andrew Kreisberg  |  Sarah Schechter  |  Greg Berlanti
ProducerGlen Winter  |  Joseph Patrick Finn
Co-ProducerJulian Meiojas  |  Geoff Garrett  |  Carl Ogawa  |  Jennifer Lence
Consulting ProducerBen Sokolowski
Associate ProducerCurtis Krick  |  Scott Sebert
Production DesignerTyler Harron
EditorChris Conlee
CastingLyndsey Baldasare  |  David Rapaport
First Assistant DirectorRobert Crippen
Second Assistant DirectorChad Belair
MusicBlake Neely
Music EditorAngela Claverie
Music SupervisorSeason Kent
Costume DesignerKate Main
Key GripWill Parrott  |  Dustin Allen  |  Justin Tocher
Set DecoratorJoanne Leblanc
Location ManagerGreg Jackson
Property MasterGordon Deyell
Assistant EditorChris Oakes
Re-Recording MixerEthan Beigel  |  Aaron Levy
GafferBurton Kuchera
Director of PhotographyC. Kim Miles
Story EditorBrooke Eikmeier
Stunt CoordinatorJ.J. Makaro
Art DirectorSimone Gore
Production ManagerCharles Lyall
Sound MixerRick Bal
Executive Story EditorKai Yu Wu  |  Grainne Godfree
Visual Effects SupervisorArmen V. Kevorkian
Department Head HairSarah Koppes  |  Rita Mooney
Casting AssociateTara David
Department Head Make-upTina Teoli
"B" Camera OperatorDean Webber
Canadian CastingSean Cossey  |  J.J. Ogilvy
On Set Vfx SupervisorMarc Lougee
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