When A Stranger Calls (2006, U.S.A.)

For Jill it was the perfect babysitting job because the children were already in bed.   All she had to do was wait for the parents to come home.

However her peace is disturbed by a phone call.  Fear strikes when an ominous voice asks, ‘Have you checked the children?’ Locked in with the lights out and the curtains drawn, a panicky Jill phones the police.  When they trace the calls the find that they’re coming from inside the house. And as the frightened teenager goes upstairs to check on the children, Jill’s quiet night of babysitting is about to turn into a nerve-shattering nightmare of suspense, horror and dread.