Rhett Allain tackles the issue of gravity in space and weightlessness as he dissects the scene he saw from The 100.
This is a common problem that many of us who teach intro physics encounter. Students, and the general public, often have a severe misunderstanding of the concept of "weightlessness", and equate that to having zero gravity. Certainly the example of being in a free-falling elevator, or even the example of the zero-g simulation in airplanes (the "vomit comet") are clear examples where one can be weightless but still in an environment with g not being zero.
It is one of those topics where, as physics instructors, we are resigned to a life-sentence of educating people non-stop about this misconception.