Erin's POV.

"Catlin!" I called and ran after her, in normal human speed. "Who is Zoom?" No reply.

We both reached the rest of the group and she walked strait to Barry and said,

"Your parents were killed by Reverse-Flash." She looked up at me. "You asked me who Zoom was after I said his name. He is a metahuman from another universe. He is a speedster like you two but 4 times faster. We have been trying to catch him but so far no luck." She walked over to one of the computers and pulled up a video of Zoom running.

"Is this what killed your parents?" I stared at the flashes of blue lightning. That's exactly what I was 6 years ago. This man was the one who killed my parents. Even though I was only 16, my job as a forensic scientist seemed like a waste of time. I would not have got anything from working there anyway.

"That's the guy I saw in my house e6 years ago, he killed my parents." I said, "Where is he?" I turned to look at everyone. "Where the hell is he?"

"Calm down Erin," Thea said running up to me. "I bet they know where he is. Right?"

"We do," Cisco replied, "But you won't like it."

"Where?" I growled, "I'm going to kill that son of a bitch."

"Erin, we can't get to him because he is in another universe at the moment, Earth 2. Not even Barry is fast enough to open up the portals again."

"Guys, you don't know what I have been doing for the past few months. I have been able to run from here to Star City and back 10 times in a minute. To be honest Barry." I turned to look at him, "I'm pretty sure I can run faster than you. When flying I can go quicker still. Please let me try to open up these portals." I pleaded.

There was silence in the room.

"Barry," Oliver spoke up, "Don't you guys have a treadmill that you run on, the one that can cope with your speed."

"We do," Cisco replied, taking a sip from his slushy, "But if Erin isn't lying on how fast she is going then putting the treadmill to its highest level would be like a jog to her."

"How fast is its limit?" Diggle asked.

"Mach 5." Said Catlin.

"Can I have a go, I still don't know the extent of my speed and this might be able to give me some reference." I said.

Catlin, Cisco and Barry looked at each other.

"Sure," Barry yawned. "Follow me." I followed him into a room that came right off the cortex. Inside was a treadmill that looked like it was on steroids.

"I'll show you my top speed on it and if you can beat it we will try and help you break the dimensional barrier." I heard Barry say as he stepped onto the treadmill. "Ok Cisco." He called.

The treadmill started moving and Barry started running at the normal pace of a human. Looking over the machine I saw a number which looked like the speed Barry was moving. 7 miles an hour. 8 miles, 13 miles, 18, 29, 46, 68 and so on. Within moments it was reading at Mach 2.7 and then it spiked up to Mach 3.5.

I slowed time around me to look at Barry's technique. Not too bad but the length he keeps his feet in contact to the floor was slowing him down a bit. Then I realized that I was going so fast that Barry running at his top speed looked like he was running in slow motion. I stopped moving as fast so everyone around me was going at her same speed.

"Thanks Barry." I told him as he stepped off the treadmill and I stepped on.

"No problem, just don't push yourself too hard to try and beat me. Ok?"

"Very unlikely." I replied.

"Ok stare jogging and when we hit 30miles an hour then we will start going to Mach 1 and so on." Catlin told me.

I started running at a normal persons jogging pace and the treadmill started to pick up speed. I kept going faster and faster. Soon, though it felt like 5 minutes for me but probable was only a few moments for everyone else, I was up to Mach 4.8, 4.9, Mach 5. I still felt like I was jogging.

All of a sudden there was a loud alarm going off which put off my concentration and I fell to the ground. Within seconds I was on my feet again and in the cortex with Catlin, Cisco, Barry, Thea, Diggle, Oliver and another man that I haven't seen before.

"What's wrong Harry?" Cisco asked the man.

"Well nothing is wrong Ramone, not if you think that Zoom running around town placing down metas from Earth 2 is wrong!" The man, Harry, yelled.

Yes! It was finally time that I met my parents' killer and he will pay for what he did.

Word Count: 850

Hey everyone. Just so you know I am going through the story and have found some mistakes in grammar and stuff so I'll be going back through it and editing it over the next few days.

Thanks for reading!