Time-travel has always been a big part of The Flash but season four put that on the backburner after Barry Allen's battle with Savitar revealed just how much damage he had done to the timeline. However, a new set photo seemingly confirms that the concept will once again come into play because Grant Gustin has been spotted shooting The CW series wearing the costume he wore during season one.
Nora West-Allen appeared throughout season four but it wasn't until the finale that we learned why she travelled back in time. The question is, is this scene a flashback or are we going to see that she also raced back to Barry's formative years as the Scarlet Speedster? She did say that she made some sort of mistake so it's definitely possible that her travelling back has disrupted history in a big way for her dad.
What are your theories? We'll learn more at Comic-Con this weekend so stay tuned for updates!