The 2008 “Pilot”, essentially an 81-minute feature film directed by Alex Graves and written in part by J. J. Abrams, starts when a distressed passenger on an overseas flight to Boston gives himself an insulin injection on the plane (that’s permitted, and I didn’t want to see his gams). Pretty soon, his body disintegrates, and so does that of everyone else on the plane, which lands at Logan on auto-pilot.
Picture (first): Imagine, if you will, a model railroad running on a Mobius strip. The other "side" below any point on the strip is the same "place" a couple hundred years ago. A vehicle for time travel? Fringe science and mathematics, anyone? This is all "algebraic topology".