影片讲述了一次大学实验唤醒了一股超自然力量，一对夫妇备受其恐吓的故事。
Ashley Greene
Kelly
Sebastian Stan
Ben Curtis
Tom Felton
Patrick
Julianna Guill
Lydia
Anna Clark
Maggie
Suzanne Ford
Mrs. Henley
Rick Gomez
Mike
Luke Pasqualino
Greg
Melissa Goldberg
Fast Food Girl
Tim Williams
Office Executive
Meena Serendib
Veterinarian
John Grady
Apparition (uncredited)
Marti Matulis
