Time travel is always a disorienting experience. The transition is always abrupt; one moment you're in the lab, the next you're... not.
The air is heavier here, with pressure and anticipation. And it's dark. Your eyes try to adjust to the sudden change in lighting, but it's no use.
You recall the mission instructions:
The antibiotic strain should be in the hospital's laboratory. The laboratory is in the basement, and you should arrive there, but beyond that we're not sure where the sample would be. The hospital has been evacuated, so you should be free to search. You'll have 30 minutes before the hospital is destroyed. We'll pull you back before that happens. You should have more than enough time to secure the sample.
"Hello? Is someone there?" A plaintive whisper where there should be absolute silence.
You click on your torch.
She's young, probably early twenties at the most; you're not quite sure how to read age cues from a hundred forty years ago. She looks terrified.
And in half an hour, she'll be dead.