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.
S02E02 - Flash of Two Worlds
A mysterious man has a warning about an evil speedster intent on destroying The Flash; a determined officer wants to join Joe's meta-human task force.
S02E03 - Family Rogues
Barry and the team ally with the kidnapped Captain Cold's sister, but Barry feels duped with he learns Snart is working on something with his father; Joe faces a difficult decision.
S02E04 - The Fury of Firestorm
Barry and the team look for another Firestorm match for Dr. Stein. When the team meets Jefferson Jackson, Caitlin has her reservations about whether Jax is the right match for Dr. Stein. Iris surprises Joe while Barry and Patty grow closer.
S02E05 - The Darkness and the Light
Barry learns a new breacher, Dr. Light, has come through the portal and sets off to capture her. Jay tells Barry that Dr. Light was not a threat on Earth-2 and that Barry can reason with her. However, during a fight with The Flash, she blinds him and drops some shocking news about Zoom. Meanwhile, Barry and Patty go out on a date.
S02E06 - Enter Zoom
Barry and his team plan to trap Zoom with Linda's help while Joe is against it.
S02E07 - Gorilla Warfare
Barry races to rescue Caitlin when Grodd kidnaps her; Cisco plans a date with the new barista at Jitters; Patty thinks Barry is hiding something.
S02E08 - Legends of Today
When Vandal Savage attacks Kendra Saunders, Barry takes Kendra to Starling City, seeking Oliver's protection; Harrison asks Jay to test a new serum to make Barry run faster.
S02E09 - Running to Stand Still
Weather Wizard returns to break Captain Cold and the Trickster out of Iron Heights, but Barry is determined to not let that happen. Meanwhile, Joe and Iris meet Wally West. Harrison Wells agrees to work with Zoom against Barry.
S02E10 - Potential Energy
Barry and the Star Labs team hunt down The Turtle who can slow down time. Barry faces a choice on whether or not he should reveal his secret identity to Patty.
S02E11 - The Reverse-Flash Returns
Dr Harrison figures out how to induce Cisco's ability. They hence learn that Eobard Thawne is still alive. Iris is saying farewell to her mother. Patty realizes there's more to Barry than meets the eye.
S02E12 - 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.
S02E13 - Welcome to Earth-2
Dr. Harrison, Cisco and Barry travel to Earth-2 to save Harrison's daughter. Barry assumes the role of his doppelganger, who's married to Iris. He then encounters alternate-Caitlin and alternate-Ronnie, who are Zoom's agents.
S02E14 - Escape from Earth-2
On Earth-2, the team asks for help from an unexpected source to find Zoom's lair, while on Earth-1, Caitlin tries to perfect Velocity-9 so Jay can stop the Geomancer.
S02E15 - 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.
S02E16 - Trajectory
Trajectory arrives in town intent on creating maximum chaos. Trajectory's antics are misinterpreted as having been perpetrated by The Flash himself. Barry must thus act quickly to uncover the mystery of who is causing damage, so others do not think it is him, and what may be driving her mad desire for speed and destruction.
S02E17 - Flash Back
After the shocking revelation of Zoom's real identity, 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 arch-nemesis, Dr. Harrison Wells/Eobard Thawne, to teach him how to run faster. However, things do not go as planned and Barry is stunned to face familiar foe Hartley Rathaway, as well as old friend Eddie Thawne. Iris makes peace with her past in order to embrace her future
S02E18 - Versus Zoom
Barry, having now learned how to travel between the different Earths, decides to take the fight to Zoom.
S02E19 - Back to Normal
A meta human with super strength named Griffin Grey mistakes Harry for Earth-1 Harrison Wells and kidnaps him, demanding that Wells cures him from his current condition. Realising another brilliant Wells could track Griffins location, Barry asks Jesse to help. Meanwhile, Wally corners Joe about the Flash.
S02E20 - Rupture
Zoom arrives back on Earth-1 intent on taking over Central City. Barry and Wells come up with a plan to stop Zoom once and for all but it's extremely dangerous. Unsure if he should take the risk, Barry reaches out to both fathers for advice. Henry is adamantly opposed to Barry risking his life again but Joe thinks he can handle it which puts the two men at odds with each other. Meanwhile, Cisco is shocked when he vibes the Earth-2 villain Rupture, who happens to be his brother Dante's doppelganger. Rupture came to this Earth seeking justice for Reverb's death. Iris ...
S02E21 - 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.
S02E22 - 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.
S02E23 - The Race of His Life
After Zoom reveals his true plan, Barry vows to do whatever it takes to stop him.