The Flashis bringing back an entire rogues gallery of villains in the series finale.
“And God bless them, they somehow made it work and shifted some things around on the schedule.
We shut down for a day.

Grant Gustin as the Flash.Colin Bentley/The CW
And I felt fine!
I just had to sit at home and wait to do my last few days for a while.”
While Gustin was in quarantine, production continued as best as it could without its star.
“They were going to have to shoot some of his stuff to add on green screen.”
But once he finished quarantining, he went back to work immediately.
It was a really special moment.
He laughs before adding, “It felt like they were trying to keep me here.
We just prolonged the end.”
The Flashseries finale airs Wednesday, May 24, at 8 p.m. ET/PT on the CW.