Episode 1 | The Man Who Saved Central City

Still feeling responsible for Eddie's death, Barry pushes his friends away and tries to protect the city on his own; Cisco assists Joe with the Meta Task Force.

Episode 2 | Flash of Two Worlds

A mysterious man brings warning of an evil speedster intent on destroying The Flash, and a determined officer wants to join Joe's meta-human task force.

Episode 3 | Family of Rogues

Barry and the team ally with the kidnapped Captain Cold's sister, but Barry feels duped when he learns Snart is working on something with his father; Joe faces a difficult decision.

Episode 4 | The Fury of Firestorm

The quest to find the destabilizing Dr. Stein a new merge partner brings about the emergence of a new, hot-tempered, meta-human malcontent.

Episode 5 | The Darkness and the Light

As an encounter with another Earth-2 meta-human leaves Barry blinded (right before his first date with Patty), Dr. Wells outs Cisco.

Episode 6 | Enter Zoom

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

Episode 7 | Gorilla Warfare

Barry's team races to rescue Caitlin when Grodd abducts her; Cisco plans a date with the new barista at Jitters; Patty knows Barry is hiding something.

Episode 8 | Legends of Today

Vandal Savage sets his sights on Kendra Saunders, forcing Barry to hide Kendra in Star City with Oliver and Team Arrow.

Episode 9 | Running to Stand Still

Believing Flash to be weakened, Weather Wizard returns to break Captain Cold and The Trickster out of Iron Heights Prison to form a triumvirate against him at Christmastime.

Episode 10 | Potential Energy

Barry and the S.T.A.R. Labs team hunt down The Turtle, who steals kinetic energy. Barry faces a choice on whether or not he should reveal his secret identity to Patty.

Episode 11 | The Reverse-Flash Returns

Dr. Wells figures out how to induce Cisco's ability; they hence learn that Eobard Thawne is still alive. Iris says farewell to her mother. Patty realizes there's more to Barry than meets the eye.

Episode 12 | Fast Lane

Barry tries to team up with Dr. Harrison but finds out Harrison prefers working alone. The Flash fights a new meta-human. Iris researches her brother's drag racing. Dr. Harrison starts stealing Barry's speed.

Episode 13 | Welcome to Earth-2

Barry, Wells and Cisco journey to Earth-2 to rescue Wells' daughter, Jesse.

Episode 14 | Escape from Earth-2

On Earth-2, the team races to find Zoom's lair and asks for help from the most unexpected source. Meanwhile, back on Earth-1, Caitlin rushes to perfect Velocity-9.

Episode 15 | King Shark

When King Shark escapes from an A.R.G.U.S. holding tank, Lyla and Diggle travel to Central City to warn The Flash. King Shark shows up at the West house and attacks Joe, Iris, Wally and Barry.

Episode 16 | Trajectory

While The Flash gets blamed for a lady speedster's anti-social antics, Jesse becomes appalled at how far Harrison will go to protect her.

Episode 17 | Flash Back

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

Episode 18 | Versus Zoom

Barry, having now learned how to travel between the different Earths, decides to take the fight to Zoom.

Episode 19 | Back to Normal

As Barry adjusts to life without superpowers, a super-strong meta-human abducts Harrison, and Wally pesters Joe for a meeting with The Flash.

Episode 20 | Rupture

When Zoom arrives back on Earth-1 with the villain Rupture, Barry and Wells come up with a very dangerous plan to stop them forever.

Episode 21 | The Runaway Dinosaur

Iris volunteers to act as the bait in a plan to trap Girder in S.T.A.R. Labs; Barry struggles to go back to his old life.

Episode 22 | Invincible

Zoom unleashes an army of Earth-2 meta-humans, the leader of which is Black Canary's doppelganger, Black Siren; Joe worries when Wally goes out to help The Flash.

Episode 23 | The Race of His Life

After Zoom reveals his true plan, Barry vows to do whatever it takes to stop him.