Crafting a series finale is no joke.
The words “daunting” and “downright impossible” come to mind.
“I love theLostfinale so much because it was two hours and it’s full of emotion.

Grant Gustin on ‘The Flash’.Justine Yeung/The CW
They cried and I cried and everybody cried.
Man, I still remember the feelings I had watching thatAngelfinale it just blew me off the planet.”
I’m like, ‘I have to deliver a similar feeling in our series finale.’
That’s when I decided there had to be a lot of faces from the past."
“To me that’s more important than paying off a particular plot strand.”
“That worked really well for the tone ofAngel.
And so, I did a little twist on it.”
The showrunner still promises that he did end the series “properly” in the finale.
And that’s what I got out of thatAngelfinale: I wonder what happens next?
And I can write my own story from there.
I thought that was so clever, and we have something like that in our series finale."
The Flashseries finale airs Wednesday, May 24, at 8 p.m. ET/PT on the CW.