Season 04, Episode 23 – “We Are the Flash ”
In the Season 4 finale, Team Flash gets help from a surprising ally in their battle against DeVoe.
Season 04, Episode 22 – “Think Fast”
When DeVoe assaults an A.R.G.U.S. facility to complete his Enlightenment Machine, Barry realizes the only way he can stop him is if he allows Cisco and Caitlin to accompany him into the facility. Still shaken by Ralph’s death, Barry isn’t sure he wants to risk any more of his friends’ lives and considers taking on DeVoe solo.
Season 04, Episode 21 – “Harry and the Harrisons”
With DeVoe’s Enlightenment device nearly complete, in order to disable it the Flash and his team must put their faith in an unlikely ally—Amunet Black. Meanwhile, Harry hits an all-time low.
Season 04, Episode 20 – “Therefore She Is”
Barry and Team Flash team up with Gypsy to try to thwart Thinker’s plan. Meanwhile, Cisco and Gypsy have a heart-to-heart talk about their relationship.
Season 04, Episode 19 – “Fury Rogue”
When Barry needs help transporting a dangerous meta, he calls on a new friend for help—Leo Snart AKA Citizen Cold. Meanwhile, Cisco becomes suspicious of Harry.
Season 04, Episode 18 – “Lose Yourself”
When Barry and Team Flash find a way to enter The Thinker’s lair, Ralph considers crossing a dangerous line to defeat DeVoe. Meanwhile, Joe is concerned by Harry’s recent behavior.
Season 04, Episode 17 – “Null and Annoyed”
Barry and Ralph take different approaches to finding the remaining bus metas before DeVoe gets to them. However, Ralph’s cavalier attitude frustrates Barry and the two clash over what it means to be a hero. Meanwhile, Breacher returns to ask Cisco for a favor.
Season 04, Episode 16 – “Run, Iris, Run”
Team Flash confront a new bus meta, Matthew AKA Melting Pot, who has the ability to swap people’s DNA. During a battle with Team Flash, Matthew accidentally takes Barry’s speed away and gives it to Iris. Now, with a new threat unleashed on Central City, Barry must act as the team leader while Iris takes on the mantle of superhero speedster in order to defeat their new foe.
Season 04, Episode 15 – “Enter Flashtime”
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 04, Episode 14 – “Subject 9”
Barry meets a powerful woman whose abilities could help him in his battle with DeVoe. Meanwhile, after learning that DeVoe is targeting everyone who was on the bus, Ralph decides he doesn’t want to be a hero anymore, his only concern is staying alive. Harry offers to help Joe