Board Thread:The Flash discussions/@comment-807326-20170208011832/@comment-3221148-20170208201559

Kir the Wizard wrote: Steven Bomb 17 wrote: Remind me, when Iris died in the comics how did she come back? It was BRONZE AGE, times were weird. And as for how she actually came back? That was already in New Earth. Before that, she and Barry lived in the 31st century for some time after his trial, before Barry went back to the 20th century and sacrificed his life to end the Crisis on Infinite Earths.

Later in the New Earth, she just kinda appeared in the nineties sometime after Thawne (who was time traveling for the first time and impersonating Barry) got away, but left his 25th century book, which was written by Iris about Barry's biography.