The Flash Season 6 Episode 8
The Last Temptation of Barry Allen, Pt. 2
Allegra: You want me to do what?
Cisco: Barry’s plan is to let the light in. It isn’t for Ramsey to spread his infection to the city, it’s for you to spread the antidote.
Iris: Our love story never ends Barry, even with Crisis.
Barry: Iris it’s inevitable.
Iris: Maybe, but whether you vanish or…worse I’m going to be right there with you. Right there till the very end, okay? Because the only thing more inevitable than crisis is us.