Fast Enough

Synopsis
Wells presents Barry with a life-changing choice. Dr. Martin Stein and Ronnie Raymond return to help the S.T.A.R. Labs team with this final fight.

Main Characters

 * The Flash's Team
 * The Flash (Barry Allen)
 * Martin Stein
 * Ronnie Raymond
 * Caitlin Snow
 * Joe West
 * Cisco Ramon
 * Iris West
 * Eddie Thawne
 * Nora Allen
 * Henry Allen
 * Kendra Saunders
 * David Singh

Villains

 * Harrison Wells/Reverse-Flash (Eobard Thawne)

Other Characters

 * Captain Cold (Leonard Snart)
 * Captain Cold (Leonard Snart)
 * Captain Cold (Leonard Snart)
 * Captain Cold (Leonard Snart)
 * Captain Cold (Leonard Snart)

Teams and Organizations

 * The Flash's Team
 * S.T.A.R. Labs
 * CCPD
 * IHP
 * CC Jitters
 * CCPN
 * CCPN
 * CCPN

Species

 * Metahumans
 * Humans
 * Cows
 * Thanagarian-Human Hybrids
 * Thanagarian-Human Hybrids

Objects

 * The Flash Suits
 * Reverse-Flash Suit
 * Cisco-ed Treadmill
 * Wormhole
 * Girder
 * Reverse-Flash Ring
 * Tachyons
 * Captain Cold Suit
 * Captain Cold Goggles
 * Tachyons
 * Captain Cold Suit
 * Captain Cold Goggles
 * Captain Cold Suit
 * Captain Cold Goggles
 * Captain Cold Suit
 * Captain Cold Goggles
 * Captain Cold Goggles

Locations

 * Earth-1
 * Earth
 * USA
 * Missouri
 * Central City
 * S.T.A.R. Labs Central City Facility
 * Particle Accelerator
 * Allen House
 * CC Jitters
 * CCPN Office
 * Keystone City
 * IHP
 * Speed Force
 * Keystone City
 * IHP
 * Speed Force
 * Speed Force
 * Speed Force

Trivia

 * The visions in the Speed Force predicted future events in the series.
 * The Flash Museum is later introduced in Season 5 as a different design.
 * Barry's imprisonment in Iron Heights Prison is later shown in to.
 * The vision of Killer Frost is later shown as the one of Earth-2.
 * The vision of Sara, Ray, Snart and Barry fighting a giant robot was later revealed as a test footage for and was used as the series' first look trailer.