We’ve got our hands on the trailer of “Wallflower”, the next episode of the awesome sci-fi TV series Fringe:

Fringe S04E07 Wallflower
“When a man mysteriously dies by an invisible force, his body rapidly begins turning ghostly white. The Fringe team learns that this is not an isolated incident, and there’s evidence that links the predator to someone who passed away with an unknown genetic disorder. Meanwhile, Olivia (Anna Torv) suffers from migraines.”

Is it a ghost or something worse?
:)