This week on The Flash, Wally comes to visit family and friends in Central City but comes with news that something is wrong with the Speed Force.
Barry has noticed certain glitches in his powers but just tried to ignore it in hopes that it would work itself out.
Wally is connected to the Speed Force in a way that Barry will likely never achieve.
Barry has a very physical connection with it, while Wally has a mental connection. He can project his mind into the Speed Force, whereas Barry has to actually run into it.
After some persistence, Barry tells Wally about the fight he had with the Speed Force when Bloodwork infected him. Barry hasn’t really spoken with the Speed Force since then but had to force his way in during Crisis to save the world.
Barry is afraid to face it, ashamed of how he behaved the last time they met.
The Flash’s actions in Crisis might have doomed the Speed Force to death.
Wally doesn’t give Barry a choice, bringing him into the Speed Force sneakily as they speak.
The Speed Force is clearly sick, bathed in a green light, and filmed in unbalanced dutch angles. The Speed Force is dying because of what Barry did, but it’s unclear what that means.
Wally is furious with Barry, telling him he was selfish and thoughtless. He’s not the only one connected to the Speed Force, so why didn’t he tell Wally what was going on?
It turns out that the energy Barry borrowed from the Spectre during Crisis is what infected the Speed Force and is causing its death. But the Speed Force doesn’t blame Barry.
He didn’t know, and there’s nothing else he could have done under the circumstances. He saved the world, after all.
The Speed Force, in the form of his mother, tells Barry she loves him before she dies. He is the best choice it ever made.
Barry is grieving the death of the Speed Force, and Joe reminds Wally that there’s no need to beat Barry up over his mistake. After all, they both know he’ll do that all by himself.
Wally apologizes to Barry. Without the Speed Force, they’ll both eventually lose their powers, so they have to support each other.
Meanwhile, there’s a meta-villain who can control time, and she’s after some members of witness protection.
Caitlin makes a formula to stop her. Joe ends up as a hostage, so Barry and Wally use their limited resources to take the most direct route to CCPD and save the day.
They still need to do what they can while they still have powers.
Wally leaves for his next Peace Corps mission, but he tells Joe to keep an eye on Iris. There’s something different about her.
Yeah, because she’s Mirror Clone.
It was only a matter of time before she got found out, but it’s Kamilla who realizes she’s not what she seems.
A photo she took of Iris reveals that she’s made of mirror, but before Kamilla can process what she’s seen or tell anyone, Mirror Iris shoots her with the mirror gun, and she disappears.
What is Mirror Iris after and how will Team Flash stop her?
On top of all that, Nash is taken over by Eobard Thawne’s consciousness.
Cisco returns from his trip, but when Nash asks for his help busting some ghosts, he blows him off. Cisco is in a mood because his epic trip didn’t result in the change he was hoping.
Once Caitlin convinces him to get over himself and help Nash, it’s already too late. Cisco realizes pretty quickly that Nash is not Nash.
Thawne tries to kill Cisco by phasing his hand through his heart, but because he’s trapped in Nash’s body, he doesn’t have his powers.
Thawne and Cisco struggle and Thawne might have killed Cisco if Cecile hadn’t come along and tased him.
Thawne/Nash is imprisoned in the pipeline. He tells Barry that he’s going to kill him — after all, that’s all he ever wants to do.
But once he gets out, he won’t just kill Barry. He’s going to kill his family and then every one of his friends.
He also mentions something about how he constructed his own version of the Speed Force, so that gets Barry thinking. Maybe Team Flash could do the same thing, and that would preserve his powers.
The Flash airs Tuesday at 8/7 C on The CW.