The Flash, Season 5

Iris:
Still swirling around up there?

Barry:
I just don't get Nora. I mean, I thought our training was sinking in. I mean, she defeated Block, she was really making progress. And next thing you know, she wants to break into CCPD and kidnap a suspect in police custody. I mean, it's like she wants to... make Hersch Cicada.

Iris:
Barry, you really don't get why she's obsessed?

Barry:
Wait, should I?

Iris:
Think about it. She's been hearing about the ripple effects on the timeline since she got here. And at first, they were relatively small, but now, Cicada...

Barry:
Not so small.

Iris:
He's one of the worst serial killers in history, and now because of Nora, he's here early. And an entirely different person.

Barry:
With an entirely different set of victims.

Iris:
That is a huge weight to bear for someone who just wanted to spend time with a dad she never knew. She feels really guilty, Barry. She wants to try to fix her mistakes, whatever that takes. Sounds like another speedster I know, actually.