- "The last time Barry Allen saw you, you took the life of his close friend. And now he sees you, and he pauses. You really don't see it. You can calculate near-infinite outcomes across multiple Earths, but you cannot account for how someone is feeling."
- —Marlize DeVoe to Clifford DeVoe
|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.|
"Fury Rogue" begins with Wells in his mystery room asking Gideon to perform tests on him. It's uncovered he's losing the entirety of his insight because of the additional utilization of his reasoning top.
Barry and Iris are talking with their specialist over the death of Ralph Dibny. Barry tells the advisor that he isn't generally irritated by Ralph's passing. He has a go at clarifying that he doesn't let demise trouble him now and the specialist advises him that he'll wind up lamenting in the end.
The DeVoes are discussing their arrangements in their dimensional pocket. Marlize attempts to persuade her better half to take some alone time yet Clifford won't quit any pretense of chipping away at his arrangements.
Wells strolls in Cisco's lab similarly as Cisco is going to start to think critically. Wells prevent him from doing as such, yet Cisco eventually persuades him that they have to fabricate a subsequent reasoning top so the two of them can utilize one.
Caitlin uncovers to Iris that Killer Frost still can't seem to make a return. An alarm begins sounding and Team Flash sees that The Thinker is attempting to follow Fallout.
Snart is on Earth-X. He's in a previous Nazi compound when he's unexpectedly overwhelmed by Siren-X. Barry and Cisco show up in the nick of time to spare Snart from her forces and they escape.
At the point when the trio returns to STAR Labs, we see that Siren-X additionally endured Cisco's penetrate.
Group Flash discloses to Snart what they're conflicting with. Barry uncovers that ARGUS will be moving Fallout to a safehouse and they clarify that they need Snart's virus firearm to keep Fallout cool to ensure he doesn't overheat.
Wells and Cisco complete their subsequent reasoning top and Cisco gives it a shot. Wells deliberately over-burdens the top with the goal that it shorts out and stops working. Cisco understands that the parts the broke on the reasoning top will take a long time to fix.
Barry clarifies Team Flash's loss of Ralph to Snart. Snart takes on a genuine tone and clarifies that in the event that he needs to be a genuine pioneer, he needs to lament the loss of his partners.
Joe, Iris, and Caitlin stroll in and tell Barry and Snart that ARGUS is prepared to move Fallout. We discover that Siren-X caught their discussion and is anticipating tailing them to abuse Fallout's forces.
The gathering shows up at Fallout's area and begin to prepare for transport. Barry gives a persuasive talk, to which Snart reminds him to follow his own recommendation.
Caitlin and Snart are sitting in the rear of the vehicle truck with Fallout when Caitlin finds a clingy note from Killer Frost. She clarifies the procedure she's proceeded with her modify self image.
Barry stages into the truck to investigate them and when he does, Iris sees that she sees pocket measurement movement. He leaves the truck with Snart and they are immediately drawn nearer by DeVoe. Barry has a go at utilizing the sonic tuning fork on DeVoe, yet he's presently insusceptible to it with his recently gained powers from Dibny.
DeVoe's drawing nearer Barry and Snart when they're overwhelmed by Siren-X. DeVoe get away yet Siren-X utilizes zip connections to tie the hands of Joe, Caitlin, and Fallout. Barry and Snart make it back to STAR Labs and educate the rest regarding the gathering about the new Laurel.
Cisco returns into his lab with the necessary part for the reasoning top. He got it from Gypsy. Cisco's attempting to fix the reasoning top when Wells gets so annoyed that he breaks it into equal parts. At the point when Cisco inquires as to why Wells takes him to his mystery room and shows him the sweeps Gideon has taken, uncovering he's truly losing his psyche.
DeVoe comes back to his den and is disturbed that he lost the main atomic metahuman they approach. His significant other attempts to disclose to him that he can ascertain about endless prospects, yet he can't perceive how individuals feel.
Snart's conversing with Barry about Dibny's passing. Barry still declines to appropriately lament over the demise.
Alarm X takes Joe, Iris, and Fallout to CCPD home office. Barry and Snart are made aware of Siren-X's quality at CCPD and the pair speeds there. Alarm X begins utilizing her forces on Fallout, attempting to get him got used to where he detonates, exploding over the city.
After she thumps back Snart and Caitlin, who both have cold weapons, Barry freezes considering Ralph. Snart gives Bary a motivational speech who accelerates to take out Siren-X with the goal that she quits utilizing her forces on Fallout. Snart and Caitlin get back up and utilize the virus firearms to chill Fallout.
The gathering doesn't see Barry anyplace until Joe's ready to discover him upstairs crying over Ralph's passing.
Group Flash meeting back at STAR Labs, and we discover that ARGUS has migrated Fallout to an excessively mystery safehouse that is practically difficult to track down. Cisco endowments Snart a gadget that will let him break between earths on the off chance that he needs to take anybody back to their Earth.
Snart offers his goodbyes to everybody on Team Flash and penetrates back on Earth-X.
Iris and Caitlin are discussing Caitlin's powerlessness to switch over to Killer Frost. Caitlin concedes she misses her partner. The two read some new tests Caitlin ran on herself and they discover that Killer Frost is still inside Caitlin, they simply need to discover how to reactivate her.
Wells is gathering his packs to return to his Earth, yet Cisco persuades him to remain so they can deal with his knowledge. Cisco pushes Wells to inform the rest of Team Flash regarding his condition.
Barry and Iris are back at their specialist and Barry at last opens up, uncovering he feels dependable about what happened to Ralph.
We see that ARGUS has put away Fallout in an office where they utilize computer generated reality gear to cause it to appear as though he's somewhere else. We see that DeVoe has hacked the cameras inside that office and know Fallout's whereabouts.
- Grant Gustin as Barry Allen/The Flash
- Candice Patton as Iris West-Allen
- Danielle Panabaker as Dr. Caitlin Snow
- Carlos Valdes as Cisco Ramon/Vibe
- Neil Sandilands as Professor Clifford DeVoe/The Thinker
- Tom Cavanagh as Dr. Harry Wells
- Jesse L. Martin as Detective Joe West
Special appearance by
Special guest star
- Kim Engelbrecht as Dr. Marlize DeVoe
- Ryan Alexander McDonald as Neil Borman/Fallout
- Donna Pescow as Dr. Sharon Finkel
- DeVoe calls Laurel Lance/Siren-X "banshee". In Irish folklore, a banshee is a female spirit who heralds the death of a family member, usually by wailing, shrieking, or keening.
- A character named "Silver Banshee appeared on .
- When Cisco was experiencing the new Thinking Cap overloading, he shouted "Pikachu", referencing an electric mouse creature from the video game/anime franchise "Pokémon".
- Leo mentions how Barry can literally travel "back to the future", referencing the film series of the same name.
- Cisco mentions that Fallout is so far off the grid that it would take Jack Ryan "two Tom Clancy novels to find him", referencing the former fictional character by the latter author.
- When Siren-X arrives at CCPD, she mockingly refers to it as "home of the brave, land of the dead." This is a play on the phrase "land of the free and the home of the brave" from "The Star-Spangled Banner", America's national anthem.
- Siren-X's mocking is a nod to her affiliation with the New Reich, which opposes the symbolism of the national anthem.
- When Leo received the interdimensional extrapolator, he says "Something old, something new, something borrowed, something navy." This is a twist on the traditional wedding rhyme, "Something old, something new, something borrowed, something blue".
- Siren-X and Vibe are the only known Earth-X doppelgängers of main Arrowverse characters who didn't appear in . Her absence on the crossover was because Katie Cassidy was mourning the death of her father, David Cassidy, during its filming.
- When Snart is hunting down Siren-X, he says to end the "Tom and Jerry." Not only a reference of the classic cartoon, but Jerry was slang for a German by the British in the early 20th century.
- Like her other known doppelgängers, Laurel was in love with the Oliver of her Earth. However, unlike his doppelgängers, he never reciprocated her feelings.
- This episode marks the final appearance of Wentworth Miller respectively.
- Siren-X attacked CCPD headquarters without the use of her electronic mask, thus exposing her identity. This would presumably create problems for Black Siren, who is currently under the guise of a resurrected Earth-1 Laurel Lance, a well-known public figure.
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