Flash Back

"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 we do, you'll see that you can go further than you ever imagined."

- Barry Allen

Synopsis
After the shocking revelation that Zoom is Jay Garrick, Barry is more determined than ever to get back to Earth-2 to stop Zoom forever. Desperate to find a way to increase his speed, Barry decides to travel back in time and masquerade as his earlier self in order to get his nemesis, Dr. Harrison Wells/Eobard Thawne, to teach him how to run faster. However, things don't go as planned and Barry is stunned to face familiar foe Hartley Rathaway, old friend Eddie Thawne, as well as the real danger of time travel. Iris makes peace with her past in order to embrace her future.

Protagonists

 * Team Flash
 * The Flash (Barry Allen)
 * Iris West
 * Caitlin Snow
 * Cisco Ramon
 * Harrison Wells (Eobard Thawne)
 * Harry Wells
 * Joe West
 * Wally West
 * Eddie Thawne
 * Pied Piper (Hartley Rathaway)

Antagonists

 * Clay Parker
 * Clyde Mardon
 * Danton Black
 * Harrison Wells (Eobard Thawne)
 * Farooq Gibran
 * Grodd
 * Pied Piper (Hartley Rathaway)
 * Zoom
 * James Jesse
 * Kyle Nimbus
 * Mick Rory
 * Shawna Baez
 * Tony Woodward
 * Wade Eiling

Other Characters

 * Barry Allen (Earth-2)
 * David Singh
 * Enzo Ferrari
 * Ferdinand Porsche
 * Fred Chyre
 * God
 * Harrison Wells
 * Harry Potter
 * Henry Allen
 * Inky
 * Jay Garrick
 * Jesse Wells
 * Martin Stein
 * Mason Bridge
 * Nora Allen
 * Osgood Rathaway
 * Rachel Rathaway
 * Rick Astley
 * Ronnie Raymond
 * Scott Evans

Teams and Organizations

 * Central City Picture News
 * Central City Police Department
 * Iron Heights Penitentiary
 * Miliken Standard Corporation
 * Rathaway Industries
 * S.T.A.R. Labs
 * Team Flash

Events

 * Metahuman Invasion
 * Mayhem on the Cleveland Dam
 * Singularity
 * Battle in the Pipeline
 * Capture of Pied Piper
 * Particle Accelerator Explosion
 * Chase of The Flash

Species

 * Dementors
 * Humans (Earth-1)
 * Humans (Earth-2)
 * Metahumans (Earth-1)
 * Metahumans (Earth-2)
 * Time Wraiths

Objects and Concepts

 * 12 Monkeys
 * Oscars
 * Breaches
 * Eobard Thawne's Wheelchair
 * Evil Hearing Aids
 * Holograms
 * Jay Garrick's Helmet
 * Mission Impossible
 * Never Gonna Give You Up
 * Pied Piper Suit
 * Power Dampeners
 * Power-Dampening Cuffs
 * Reverse-Flash Suit
 * S.T.A.R. Labs Satellite
 * Sonic Gauntlets
 * Speed Equation
 * Wrath of Khan
 * Tachyon Enhancer
 * Temporal Wormholes
 * The Flash Suit
 * The Frightening
 * Time Aberrations
 * Velocity 9
 * Vibes
 * Zoom Suit

Locations

 * Earth-1
 * Earth
 * North America
 * United States of America
 * Missouri
 * Central City
 * Central City Airport
 * City Center
 * Courthouse
 * City Hall
 * Central Station Mall
 * Central City Park
 * Central City Police Precinct
 * Chubbuck
 * Danville
 * Englewood
 * Eobard Thawne's House
 * Gardener River
 * Lawrence Hills
 * Leawood
 * Mounds View
 * New Brighton
 * Petersburg
 * Rathaway Industries Building
 * University Town
 * S.T.A.R. Labs Central City Facility
 * Pipeline
 * Time Vault
 * Van Gelo Opera House
 * West House
 * Westminister
 * Windsor Heights
 * Western Avenue Bridge
 * Keystone City
 * Iron Heights Penitentiary
 * Cleveland Dam
 * Earth-2
 * Hell
 * Speed Force