I liked how they immediately had you confused when they landed in the airplane (making everyone wonder how they could land in the air and not on the ground. Although in reality another earth in a parallel universe may not be in the exact same spot thus, allowing for the sliders to land in the air(which could also mean sure death if they didn't land in an airplane lol). Also for that matter, other universes may not even have a planet in that location or what if they spawned inside an object.lol. I wonder if they will explain any of that later on in the show. This is as far as I have watched the show.