Kids, in 2011, we saw Barney's 2nd doppelganger.

I know I said that we saw Barney's doppelganger at the fertility office but this was when we didn't know that people had more than one doppelgnager.

Anyway, Robin's coworkers at World Wide News started sending her funny or interesting Youtube videos.

…Oh right. Youtube was before your time. I tell you about it later.

Robin was rushing towards McLaren's Bar, and luckily, the entire gang was there.

"Guys," Robin exclaimed.

"Whoa, someone got here in a hurry," Marshall noted.

Ignoring this, Robin pulled out her laptop, and opened up to a page on Youtube (again, I'll explain later) and said "I found a second doppelganger."

Immediately, all eyes were on Robin.

"A second doppelganger?" I said in shock.

"Is that possible?" Lily wondered.

"Who is it?" Marshall asked.

"Barney." Robin said with obvious excitement.

"HAH," Barney laughed suddenly. "Apparently, I'm so awesome that two of me wasn't enough."

Robin rolled her eyes and quickly showed us what was on the screen.

On the page was a Barney doppelganger, dressed in a white lab coat and had black goggles on his forehead.

"Meet Dr. Horrible," Robin announced, clearly enjoying being as dramatic as Barney. "I call him Supervillain!Barney"

"Doppelganger me is a supervillain?" Barney shouted.

"Yep." Robin nodded. "And just like you, he has a blog."

"Dr. Horrible's Singalong Blog…." I read from the top. "That's his username."

"He sings!" Barney shouted again.

Marshall had brought out his phone, and was looking up Dr. Horrible for himself.

"According to this, Dr. Horrible stopped updating a couple years ago, after he killed some girl."

"HE KILLED A CHICK!" Barney screamed in frustration. He slammed his head on the table and started weeping.

"My reputation is ruined!" he cried in anger.

"There, there Barney," Lily comforted. "This just shows how awesome you are for not turning out like that."

Barney looked up and smiled wirily. "That is true. I mean that guy didn't even suit up!"

"You know what this implicates, right" I said slowly. "There could be infinite doppelgangers. The world could be full of just look alikes."

The gang considered this before Marshall brought up another possibility. "Maybe we are doppelgangers of these other people."

The gang was silent for a long moment.

"What kind of songs does Dr. Horrible sing?"

"Well, listen to this."

"With my freeze ray I will stop the world."

And that's how we found out that there was more than one doppelganger.

"Dad, when do we get to the part where you meet mom?"

I'm getting there. This is all very important...

This is just an idea I came up with one day. Many How I Met Your Mother/Dr. Horrible stories have Barney and Dr. Horrible as the same person. Now some of those are really good, but it occurred to me that they could be doppelgangers as well.

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