The Flash Season 3, Episode 19 Synopsis: “The Once And Future Flash”


This week on The Flash, Barry travels to the future to find a way to save Iris.

This week, The Flash returns from its month-long hiatus. In “Abra Kadabra,” the last episode before The CW put a pause on the show, viewers saw Barry give up the chance to find out Savitar’s true identity. And that’s not all. Caitlin’s worst fears came true—she became Killer Frost.

Team Flash is alerted to the villain-of-the-week—Abra Kadabra. When they finally catch the thief, he tells them that he knows Savitar’s true identity and would trade that knowledge in exchange for his freedom.

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However, Gypsy wants to extradite him back to Earth-19 to stand trial and, ultimately, executed. In a moment of weakness, Joe West agrees to Abra Kadabra’s deal. In the ensuing fight between Gypsy and Abra Kadabra, Caitlin is critically injured.

The team later learns that Abra Kadabra is stealing tech to build a time machine to return home. The Flash intercepts Abra Kadabra and eventually makes the decision to hand him over to Gypsy.

Caitlin, recovering from self-surgery, suddenly starts to seize. Julian removes her anti-metahuman pendant in the hopes that her powers would take over and heal her. However, Caitlin still dies. As the team is reeling from their loss, Caitlin is suddenly revived and transformed into Killer Frost.

This week, we’ll be seeing Barry travel to the future (has the man learned nothing?) to find a way to save Iris. And we’ll also learn how far gone Caitlin is after years of being Killer Frost. Here’s the official synopsis from The CW:

“The Once and Future Flash”

"TOM CAVANAGH DIRECTS; BARRY TRAVELS TO THE FUTURE TO SAVE IRIS – Barry (Grant Gustin) travels to the future to find out Savitar’s still unknown identity in the hopes of saving Iris (Candice Patton). Upon his arrival in 2024, Barry encounters future versions of his Team Flash friends, who, following the death of Iris, have become very different people, profoundly impacted by their showdown with Savitar. It will be up to Barry to infuse a sense of hope back into the team, as he proves to be hero his future friends have been waiting for. Meanwhile, back in 2017, the hunt for Killer Frost (Danielle Panabaker) continues."

And here’s the exciting promo:

Next: Catch up with a recap of 'Abra Kadabra'

Enjoy this week’s episode, and check back with us on Wednesday morning for our full recap and review. Also, on, our friends will be doing The Flash Recaps. The excitement continues on Fridays as also gives fans a weekly round-up of The CW’s superhero universe—Supergirl, The Flash, Arrow, and DC’s Legends of Tomorrow—with their DC TV Universe special.

The Flash airs on The CW on Tuesdays at 8:00 p.m. EST.