World's End

A group of teens from different backgrounds find themselves in a remote castle together.

Ever since the twins arrived, someone has been watching them, even as they sleep.

Cat has a flashback which really disturbs her and she tries to leave.

Ghostly figures appear to Luke, Slim and AJ but seem to vanish into thin air.

Noah enters Duncan's apartment to get a map and is caught in the act.

The ghosthunters are uncomfortable when they find the holding cells, and Gaia is spooked.