The Flash (played by Grant Gustin) had an extremely tough decision to make last week.
It was recently revealed Nora West-Allen (Jessica Parker Kennedy) was secretly working with Reverse Flash (Tom Cavanagh) to supposedly help Barry with his hunt for Cicada (Chris Klein).
Although her intentions were good, Barry simply couldn’t get over the fact she had lied to him for months.
This prompted Barry to grab his daughter and send her back to the future – however he didn’t tell his wife Iris West-Allen (Candice Patton) what he was about to do.
And in an exclusive clip of episode 19 acquired by E! Barry and Iris can be seen arguing over the decision – and Iris is not happy.
Fuming, Iris yells: “Why didn’t you tell me?”
Barry screams back: “She was lying to us for months!”
And the power couple don’t seem to be stopping their argument any time soon, as they continue to scream at each other over Barry’s rash decision.
The final point of the clip sees Iris admitting she isn’t bothered by Nora’s collusion with Reverse Flash in secret.
But will the couple be able to stay together through this huge hurdle?
Barry and Iris have certainly been through a lot, and the show’s source material – The Flash comic books – have shown off a number of instances where the pair have briefly separated.
But as Iris is Barry’s “lightning rod” could this potential split prevent him from being able to return to his present time whilst time-travelling?
Previously fans began pointing out a number of easter eggs in Nora’s origin story which connected to Barry’s first foray into super heroism.
The parallels began at the beginning of her episode, as she arrived late to work as a CSI – exactly like Barry’s season one episode one arrival in “Pilot”.
Nora’s story continues to follow Barry’s when she first loses control of her super speed.
When Barry can’t find a way of getting a handle on his speed he zooms into the back of a laundry vehicle, with “Gambi Cleaners” on its side.
Nora does the same, and flew into a van called: “Gambi & Sons.”
However the episode ended slightly differently, as Nora was sent away by her father, rather than nurtured by her role model like Barry was.
Could this lead to Nora becoming the next villain in the Flash’s universe?
The Flash season five returns Thursday on The CW.