The Best Episodes Of 'The Flash'

Season 4, Episode 15

When a nuclear bomb detonates in downtown Central City, Barry, Jesse Quick and Jay Garrick slow down time by entering Flashtime. As everyone in the city is frozen, the three speedsters push themselves to the breaking point to save the city and everyone in it.

Season 1, Episode 19

While Joe and Cisco head to Starling City for answers about Dr. Wells from Capt. Lance, Barry races to catch a meta-human who can transform into anyone he touches.

Season 1, Episode 23

In the season one finale, Wells presents Barry with a life-altering choice, while Dr. Martin Stein and Ronnie Raymond (aka Firestorm) return to help the S.T.A.R. Labs team.

Season 2, Episode 23

In the Season Two finale, Zoom reveals his true plan and Barry vows to do whatever it takes to stop him.

Season 1, Episode 9

When Barry finds himself face to face with his nemesis, the Man in the Yellow Suit (aka Reverse Flash), who killed his mother, he turns to Dr. Tina McGee (AMANDA PAYS) for help.

Season 2, Episode 6

Barry comes up with a dangerous plan to defeat Zoom. Although Caitlin sides with Jay and deems it too dangerous, Iris shows her support with a surprising ally.

Season 1, Episode 22

As Wells once again gets the upper hand on the S.T.A.R. Labs team, Barry reaches out to an old foe, Captain Cold, and friends, the Arrow and Firestorm, for help.

Season 2, Episode 14

In the conclusion to their Earth-2 journey, the team races to find Zoom's lair by asking for help from an unexpected source. Back on Earth-1, Caitlin rushes to perfect Velocity-9.

Season 1, Episode 15

Mark Mardon aka The Weather Wizard appears in Central City to avenge his brother's death at the hands of Joe. And Cisco realizes that Dr. Wells is hiding something.

Season 2, Episode 17

Determined to stop Zoom forever by increasing his speed, Barry travels back in time to consult his former mentor/nemesis Harrison Wells/Eobard Thawne.

Season 2, Episode 13

Barry, Wells & Cisco journey to Earth-2 to rescue Wells' daughter, Jesse, and Barry's stunned when he meets Killer Frost (DANIELLE PANABAKER) and Deathstorm (ROBBIE AMELL).

Season 1, Episode 20

Barry, Caitlin, Cisco & Joe set a trap for Wells - using Cisco as bait. Meanwhile, Eddie makes a decision regarding Iris that leaves him unsettled.

Season 3, Episode 22

With only 24 hours left to save Iris from Savitar, Barry decides to use any means necessary and turns to Captain Cold (WENTWORTH MILLER) for help.

Season 1, Episode 1

In the series premiere, Central City forensic scientist Barry Allen (GRANT GUSTIN) is accidentally given the power of super speed in a freak particle accelerator accident.

Season 1, Episode 8 

In the first part of the epic crossover event with The Flash and Arrow, Barry is thrilled when Oliver, Felicity and Diggle join him in Central City to help stop a meta-human.

Season 2, Episode 18

Equipped with the tachyon device, Barry believes he is fast enough to stop Zoom (TEDDY SEARS) and convinces Wells and Cisco to open the breaches to catch him.

Season 2, Episode 9

Villains James Jesse (MARK HAMILL), Capt. Cold and the Weather Wizard (LIAM McINTYRE) run amok in Central City during Chistmas. KEIYNAN LONSDALE joins the cast as Wally West.

Season 4, Episode 8

When villains from Earth-X attack the wedding ceremony of Barry and Iris, the Green Arrow, Supergirl, The Flash and White Canary unite their teams to save the world.

Season 2, Episode 11

When Cisco gets a vibe of Eobard Thawne, Barry and the team don't believe it. But, after an attack at Mercury Labs, Christina McGee confirms that the Reverse-Flash is back.

Season 2, Episode 21

With Barry gone, the team must figure out a way to handle the return of an old enemy - Girder (GREG FINLEY), by trying to trap him in S.T. A. R. Labs.

Season 3, Episode 23

With nothing left to lose, Barry takes on Savitar in an epic conclusion to season three.

Season 3, Episode 8

When aliens called the Dominators attack Central City, Barry asks for help from the Green Arrow, the Legends of Tomorrow and Supergirl in the first part of the epic crossover event.

Season 3, Episode 20

Barry and the team meet Tracy Brand (ANNE DUDEK), a scientist, who may be the key to stopping Savitar. Unfortunately, Killer Frost is also after Tracy.

Season 3, Episode 7

In order to save Barry, Caitlin uses her powers, but the effort unleashes her inner Killer Frost, who ends up battling both The Flash and Vibe. Kevin Smith directs.

Season 1, Episode 4

After stopping a robbery, Barry identifies the criminal. When the villain gets his hands on a stolen cold gun that could kill the Flash, Barry faces Capt. Cold in an epic fight.