As a child Barry Allen witnessed his mother's murder. He become an assistant police forensic investigator to get answers about her death.

After the S.T.A.R. Labs' particle accelerator explosion left him in a coma, Barry was revived 9 months later with superhuman speed.

While the S.T.A.R. Labs team studies Barry's new abilities, he fights crime as The Flash protecting Central City from other metahumans. The particle accelerator accident affected many people and not all of them use their new abilities for good.

Barry Allen/Flash Quotes

Harrison: Your father's an extraordinary man. You're lucky to have him.
Barry: I'm lucky to have you, too.

Iris: He's just jealous.
Barry: Of The Flash? Should he be?

The Flash Quotes

One mystery I cannot figure out is why some people come into our lives and why some people go. Others become a part of you. Some friendships feel like they'll last forever and others end far too soon. Not every friendship is meant to last forever. What does last forever is the pain when that person is gone.

Barry

Harry: I guess this means you've traveled back in time again.
Barry: Yeah, but I...
Harry: How many times have I told you not to do that?