Barry and the team find a way into the Thinker's lair. Ralph considers crossing a dangerous line to defeat him. Joe is concerned by Harry's recent behavior.
Barry, Jessie Quick and Jay Garrick slow down time when a nuclear bomb detonates in downtown Central City. Then Iris is given Barry's speed when the team fights a bus meta who has the ability to swap people's DNA.
When Barry needs help transporting a dangerous meta, he calls on an old friend for help. Then, 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 relationsh
Barry, Jessie Quick and Jay Garrick slow down time when a nuclear bomb detonates in downtown Central City. Then Iris is given Barry's speed when the team fights a bus meta who has the ability to swap people's DNA.
Barry meets a powerful woman whose abilities could help him in his battle with De Voe. Meanwhile after learning that De Voe is targeting everyone who was on the bus, Ralph decides he does not want to be a hero anymore, his only concern is stayi
When Native American artifact collectors are attacked by a meta who bring inanimate objects to life, Barry turns to a surprising ally for help and Harry enlists Ciscos help to determine the identity of The Thinker.
Caitlin fears that her past time as Killer Frost may be back to haunt her, Felicity helps celebrate the bachelorette party while Barry is taken out for a night on the town.
Barry takes desperate measures to stop Savitar, while H.R. keeps pressuring Tracy Brand to set a trap for Savitar and Killer Frost has an interesting proposal.