Board Thread:The Flash discussions/@comment-9346948-20161005001212/@comment-27395617-20161006034219

Deception975 wrote: Steven Bomb 17 wrote:Joe gave that look I thought they were gonna say, "She's dead remember?" But then I was like, "No, they wouldn't kill Iris." I was thinking the same. Obviously Thawne did something. Barry shouldn't have brought Iris with him.

Technically Thawne did do something. He and Barry created a paradox and no matter what they do, they can't make time normal again because Reverse Flash would have to die and some other events would go on differently, causing Iris to not be there.