Original air date: 10/10/2017 Runtime: 42:22 min. With Barry trapped in the speed force, Iris, Kid Flash, Joe and Vibe have taken over protecting Central City. However, when a powerful armored villain threatens to level the city if The Flash doesn’t appear, Cisco makes a risky decision to break Barry out of the speed force. However, the Barry that comes out isn’t the same Barry that went in.
Original air date: 10/17/2017 Runtime: 42:21 min. Barry has his hands full when he takes on a dangerous meta (guest star DOMINIC BURGESS) who can control technology, while also confronting an obstacle in his personal life: the ramifications of abandoning Iris for six months to balance the Speed Force. Meanwhile, Gypsy (recurring guest star JESSICA CAMACHO) breaches in for a hot date with Cisco, but she gets annoyed when his work keeps them apart.
Original air date: 10/24/2017 Runtime: 42:21 min. Barry and the team are hit by a string of bad luck and realize it is the handiwork of a new meta, Becky (guest star SUGAR-LYN BEARD) nicknamed Hazard, who has the ability to give others bad luck, while cashing in the benefits for herself. Meanwhile, Harry Wells returns to Earth-1 to give Wally a message from Jesse (recurring guest star VIOLETT BEANE).
Original air date: 10/31/2017 Runtime: 41:50 min. Cisco (Carlos Valdes) is shocked when Gypsy (recurring guest star JESSICA CAMACHO) and her father, Breacher (guest star DANNY TREJO), shows up on Earth-1. Breacher takes an immediate disliking to Cisco and decides to hunt him. Meanwhile, Barry runs into his old nemesis, Ralph Dibny (guest star HARTLEY SAWYER). Series star Tom Cavanagh directs.
Original air date: 11/07/2017 Runtime: 41:45 min. Having received an ominous threat from her old boss, Amunet (guest star KATEE SACKHOFF), Caitlin fears that her past time as Killer Frost may be back to haunt her. Felicity Smoak (guest star EMILY BETT RICKARDS) comes to Central City to help the girls celebrate Iris’s bachelorette party, while Cisco, Joe and the guys take Barry out for a night on the town.
Original air date: 11/14/2017 Runtime: 42:19 min. When collectors of Native American artifacts are attacked by a meta named Mina Chayton (guest star CHELSEA KURTZ) who can bring inanimate objects to life, Barry turns to a surprising ally for help. Determined to crack the identity of The Thinker, Harry enlists Cisco’s help to summon the ultimate think tank: “The Council of Wells” – a roundtable of the brightest Harrison Wells’ from various Earths.
Original air date: 11/28/2017 Runtime: 42:21 min. The epic four-way crossover with Arrow, Supergirl, The Flash and DC’s Legends of Tomorrow continues. Barry Allen and Iris’s wedding brings the gang together, but things go awry when villains from Earth-X attack the ceremony. All of the superheroes band together, with help from their super friends like Citizen Cold (guest star WENTWORTH MILLER), The Ray (guest star RUSSELL TOVEY), Felicity Smoak (guest star EMILY BETT RICKARDS), and Alex Danvers (guest star CHYLER LEIGH) to take on their most formidable villains yet. Earth’s mightiest heroes – Green Arrow (guest star STEPHEN AMELL), Supergirl (guest star MELISSA BENOIST), The Flash and White Canary (guest star CAITY LOTZ) – lead their teams into battle to save the world.
Original air date: 12/05/2017 Runtime: 42:20 min. Amunet kidnaps Caitlin and puts meta-dampener handcuffs on her to keep her from turning into Killer Frost. Amunet tells Caitlin she needs her to perform a tricky medical task and if Caitlin fails, Amunet will kill her. Meanwhile, The Thinker (NEIL SANDILANDS) traps The Flash in a speedster-proof prison. With the clock ticking, The Team doesn’t have the time or resources to track both Caitlin and Barry so Iris is forced to choose who to save.