Watch Pilot. Episode 1 of Season 1.

1. Pilot

Waking from a coma, Barry harnesses his newfound extraordinary speed to combat another metahuman who uses his power over the weather to loot banks.

Watch Fastest Man Alive. Episode 2 of Season 1.

2. Fastest Man Alive

Barry takes on multiple gunmen who storm an awards ceremony he's attending with Iris, but side effects from his new superpower catch up to him.

Watch Things You Can't Outrun. Episode 3 of Season 1.

3. Things You Can't Outrun

The Flash and Joe track a deadly metahuman whose specialty is poisonous gases, and Caitlin relives the night of the explosion that killed her fiancé.

Watch Going Rogue. Episode 4 of Season 1.

4. Going Rogue

To steal a priceless diamond, Captain Cold acquires a specialized gun that can slay the Flash. Meanwhile, Joe disapproves of Iris and Eddie dating.

Watch Plastique. Episode 5 of Season 1.

5. Plastique

While he tries to persuade Iris to stop blogging about the Flash, Barry investigates an army general's connection to a metahuman with explosive power.

Watch The Flash Is Born. Episode 6 of Season 1.

6. The Flash Is Born

Barry takes on his former childhood bully, who can now turn himself into steel. In her blog, Iris finally coins the moniker "the Flash."

Watch Power Outage. Episode 7 of Season 1.

7. Power Outage

Using his metahuman power to siphon electricity, Blackout robs Barry of his speed, then sets his vindictive sights on S.T.A.R. Labs and Dr. Wells.

Watch Flash vs. Arrow. Episode 8 of Season 1.

8. Flash vs. Arrow

The Arrow arrives to help the Flash investigate a lethal boomerang, but a metahuman who can control emotions turns the Flash against his former pal.

Watch The Man in the Yellow Suit. Episode 9 of Season 1.

9. The Man in the Yellow Suit

The Flash finally gets a chance to confront the Reverse-Flash, the man who killed his mother. Caitlin gets surprising news about her fiancé, Ronnie.

Watch Revenge of the Rogues. Episode 10 of Season 1.

10. Revenge of the Rogues

While the Flash prepares to vanquish the Reverse-Flash, Captain Cold and Heat Wave team up to kidnap Caitlin and lure the Flash to his doom.

Watch The Sound and the Fury. Episode 11 of Season 1.

11. The Sound and the Fury

An embittered former protégé of Dr. Wells uses sound waves to attack the Flash. Meanwhile, Iris faces trouble in her new job as a reporter.

Watch Crazy for You. Episode 12 of Season 1.

12. Crazy for You

The Flash takes on a teleporting metahuman, Cisco investigates Ronnie's fate, and Barry and Caitlin go looking for love at a karaoke bar.

Watch The Nuclear Man. Episode 13 of Season 1.

13. The Nuclear Man

The Flash hunts for a dangerously transformed Ronnie after he attacks a scientist, and Joe and Cisco reinvestigate Nora Allen's murder.

Watch Fallout. Episode 14 of Season 1.

14. Fallout

Gen. Eiling attempts to use Ronnie and Dr. Stein for his supersoldier project, and Barry confronts the possibility that he has traveled through time.

Watch Out of Time. Episode 15 of Season 1.

15. Out of Time

A metahuman who can control the weather targets Joe to avenge the death of his brother. Cisco learns the truth about the Reverse-Flash.

Watch Rogue Time. Episode 16 of Season 1.

16. Rogue Time

The Flash travels back in time to prevent a catastrophic tidal wave, but the time warp sparks another attack from Captain Cold and Heat Wave.

Watch Tricksters. Episode 17 of Season 1.

17. Tricksters

The Flash pursues the Trickster and the copycat villain who broke him out of jail. Barry discovers the truth about Dr. Wells.

Watch All Star Team Up. Episode 18 of Season 1.

18. All Star Team Up

Felicity Smoak and the Atom team up with the Flash to take on a metahuman who's using swarms of robotic bees to attack scientists.

Watch Who Is Harrison Wells?. Episode 19 of Season 1.

19. Who Is Harrison Wells?

While Joe and Cisco intensify their investigation into Dr. Wells, the Flash faces Everyman, a metahuman who can morph into any person he touches.

Watch The Trap. Episode 20 of Season 1.

20. The Trap

After Barry glimpses the future, he and the others risk Cisco's safety in order to trick Dr. Wells into a confession.

Watch Grodd Lives. Episode 21 of Season 1.

21. Grodd Lives

After the powerfully telepathic gorilla Grodd forces Gen. Eiling to commit a robbery, the Flash and his team enter the city sewers to stop the beast.

Watch Rogue Air. Episode 22 of Season 1.

22. Rogue Air

When he learns that Dr. Wells has reactivated the particle accelerator, the Flash asks Captain Cold for help saving the metahumans trapped inside it.

Watch Fast Enough. Episode 23 of Season 1.

23. Fast Enough

Dr. Wells offers Barry a tempting proposition: a chance to go back in time to save his mother. But the consequences could be catastrophic.