Barry POV.

"Cait?" I call out. Oh yeah. 

'I'm Barry Allen, the fastest man alive... blah blah blah. I defeated Reverse Flash, Zoom, and Savitar. Including many many other metahumans- humans with powers created by the particle accelerator, made by Eobard Thawne, aka Reverse Flash. I'm the Flash, the fastest speedster like ever. I cause some stupid Flashpoint, nearly killing everyone. Caitlin Snow aka Killer Frost, finally learned to sort of control the power and rejoined. Cisco Ramon aka The Vibe, aka my best friend is here too. Harry aka Harrison Wells is here, Iris West Allen aka my beautiful wife is here, Joe West aka my adoptive dad is here. Wally West is here, and yeah. The team is pretty big... 

I sent Supergirl aka Kara Danvers another portal since apparently the other one broke or something. She should come here soon. 

"AHHHHHHH!" Cisco yelled. I supersped myself to the cortex.

 "WHAT? oh" I see some other person. I quickly put the Flash outfit thing on. Which trust me... quickly. 

"WHO THE HELL ARE YOU?" 

"Smythe, Sebastian Smythe." The man turns. 

Oh my god. It's me. 

Cisco nearly falls over. 

"Is it Halloween already?" Sebastian says. Looking at my... Clothes. 

"Shut up." 

He blinks, since we have the same voice. 

"Take the mask of..."

"WHO THE HELL? ARE YOU?" Iris looks back at me and Sebastian. 

"Sebastian Smythe." The man says. 

Iris pulls me into one of the labs. 

"Explain." She looks mad. I look out. And see Caitlin almost drop her coffee. 

"I really don't know."  

Cisco and Caitlin come in. 

"WHAT IS GOING ON? MORE DOPPELGANGERS?" Caitlin whisper yells. 

Sebastian grabs a pen and fiddles with it.

"I have no idea." Cisco looks rally confused, even for him.  

"Let's lock him up in the pipeline, he could be a Savitar!" Iris says. 

"I agree." Everyone says at once. 

I run and quickly put Sebastian in the pipeline. 

"Hey!" He bangs on the glass. "I need to get home and see my sister!" 

Cisco hits the lock button. 

"Run tests?" I say. Everyone nods. 

I bring lunch to him, still in the Flash outfit, but before I open the door I hear him.... Singing?

 A smooth criminal! 

I walk in, the heck? He's dancing around. 

I clear my throat, he looks at me. 

"What?" 

I give him the lunch and walk out, locking the door. 

"BARRY!" 

I run to the cortex. "What?" 

"He is you... Same DNA and all. But I guess he's a doppelganger." Caitlin says slowly. 

"What the frak is going on?" Everyone turns.

"Hey... Felicity..."