Η Συμμορία Φλος Ρουαγιάλ κάνει μια τρομακτική επιστροφή. Ο Μπάρι και η Άιρις φιλοξενούν έναν απρόσμενο επισκέπτη. Η Αλέγκρα δυσκολεύεται με μια σημαντική προαγωγή.

Ο Ντέσπερο επιτρέπει στον Φλας να αλλάξει τη μοίρα, μα τον έχει από κοντά. Ένας μετάνθρωπος-μέντιουμ που κάνει ληστείες στη Σέντραλ Σίτι παίζει με το μυαλό του κόσμου.

Ο Μπάρι νιώθει επικίνδυνος κι εκτός ελέγχου, γι' αυτό ζητά απ' τον Τζέφερσον να του αφαιρέσει τις δυνάμεις του. Η Άιρις δείχνει ένα σοκαριστικό βίντεο στη δύσπιστη Σεσίλ.

Ο Μπάρι ταξιδεύει στον χρόνο 10 χρόνια μπροστά και σοκάρεται όταν μαθαίνει τον σκοπό του μοχθηρού σχεδίου του Ίομπαρντ Θον. Αργότερα, ο Μπάρι συνεργάζεται με έναν εχθρό.

Ο Μπάρι και η Άιρις έχουν δίλημμα αν πρέπει να τελειώσουν για πάντα την ατέρμονη μάχη τους με τον Αντι-Φλας. Αλλά θα ακολουθήσουν συνέπειες.

After returning home from a visit for their parent's vow renewal, Bart and Nora quickly realize that things are not exactly as they left them. The duo race to repair any fissures in the timeline and restore everything back to the way it is supposed to be.

When a criminal invades the CCPD, Barry and Kramer must trust and rely on each other if they are going to make it out safely. Meanwhile, Caitlin learns a valuable lesson while out with Snow and Mark.

Barry and Team Flash get closer to figuring out the Fire Meta but no closer to finding him meanwhile Iris, needing a distraction, follows a story to Coast City.

Barry's desire to keep Team Flash safe is tested when Frost recklessly courts danger as she tries to stop the "Black Flame," meanwhile, Iris tries to help a teen girl reunite with her mother but unintentionally does more harm than good.

Barry and Chester may have found a way to stop the "Black Flame" from hurting anyone else meanwhile Caitlin decides to handle a situation on her own, possibly putting more innocent lives in danger.

With a new Meta terrorizing the city, Joe lends a hand to the local authorities, meanwhile Barry gets an assist from Cecille who helps to track the mass murderer.

Team Flash is under attack, and each must fight to save not only themselves but each other.

Team Flash uses the distraction of a bank robbing Meta to detract from the grief of losing someone they love.

The Flash gets an assist from XS. Meanwhile, CCPD enlists Chester for help when a mysterious device is found at a crime scene.

The Flash gets blasted with a shockwave forcing his body to age prematurely.

The Flash goes off the grid to look for answers about a new Meta in town. Meanwhile, Allegra pulls out all of the stops at CC Citizen Media, to protect a source and a friend.

With a new speedster in town, The Flash gets much more than he bargained for, meanwhile Cecile's powers experience a growth spurt allowing her to aid Team Flash on an entirely different level.

The Flash and team are in for the fight of their lives, meanwhile, Iris discovers the cause of her time sickness.

With The Flash still reeling from everything that just happened, the rest of the team rallies to support him when he needs it the most.