Then, after the final credit frame — the screen didn't go black.

The nurse removes her mask. It's Elisabeth — a third version. Younger than Sue, prettier than Elisabeth, with dead, doll-like eyes.

A hospital room. Elisabeth is older now — decades older — but still alive. Sue isn't there. Instead, a nurse in a hazmat suit injects something into Elisabeth's neck. She convulses, then smiles.

And the Spanish subtitles remain burned into his memory: "Segunda dosis disponible. Pregunte por ella."

"The Substance was never meant to stabilize," the nurse-Elisabeth says, staring directly into the camera. "It was meant to propagate . You thought there were only two of us? No. We are a binary fission. You are one of thousands now."

He never found the file again. But every time he looks in the mirror, just for a second, he sees a younger version of himself winking back.

("Second dose available. Ask for it.") Want me to turn that into a creepypasta-style script or a reddit post instead?