While Walter keeps seeing Peter's reflection in the mirror, the Fringe team must stop an amorphous figure whose victims' bodies decompose in just hours.
Fringe team is taking on another case without Peter. This time, they find two 12-year-old kids dead and their bodies are shockingly in an advanced state of decomposition in just hours after dying.
As the Fringe team investigates the mysterious case, they uncover an amorphous figure claiming more victims. They assume that this organism has a psychic bond with a boy who has been bullied by the dead boys.
Meanwhile, Walter becomes increasingly distracted by his hallucinations. He keeps seeing Peter's reflection in the mirror, but claims that the problem is a minor one. Nevertheless, he is caught by Olivia getting confused during his work.
"Alone in the World" will air next Friday, October 7 at 9/8c on FOX.