So I'm having a little bit of difficulty understanding Dr. Wells' motives/plot, so I thought I'd write it all out to visually see it from Point A to B, and I see a time paradox.
- Harrison Wells is actually Eobard Thawne.
- Eobard Thawne is from a time centuries in the future. We dont know what year.
- For some reason, he needs to kill Nora Allen.
- Thawne travels back in time to 1998 to kill Nora Allen and succeeds.
- However, Thawne gets stuck in 1998 and is in our time for 15 years.
- During these 15 years, Thawne goes by the name of Harrison Wells, a physicist who is trying to build a Particle Accelerator.
- (If Thawne builds the Particle Accelerator, it will affect Barry Allen and turn him into The Flash, getting super speeds that will potentially help Thawne get back to his time in the future.)
- 15 years pass and were in 2013. The Particle Accelerator is turned on. Barry is struck by lightning.
- Barry is in a coma for 9 months. When he wakes up, its 2014.
- Thawne is pushing Barry to go faster, because it will eventually lead to time travel and allow Thawne to go back to his time.
- If Thawne gets back to his time, hell need to go back in time to 1998 to kill Nora Allen.
So I guess the question is: Why does he need to kill Nora Allen?