The Stranded (2008)

In THE STRANDED, five seemingly ordinary people must face the terrifying question: What if your entire life - your childhood, your family, your memories - was a lie? For the Stranded - Sisera, Endo, Drum, and Cullen, it's true. They are unknowingly from another world, and now their past is returning to destroy them...literally.
One by one, the Stranded are assaulted by Janus, an assassin working for an otherworldly force that seeks their destruction. Their only hope: Tamree, a mysterious woman sent to Earth to protect them. She must awaken the buried memories of the Stranded, along with their unique psychic and physical abilities. But even if they can defeat Janus and his unseen masters, they must also deal with one of their own: one who, damaged and unable to deal with her incredible new powers, cuts a swathe of devastation across the Earth.