jill goes to the front door, turns the bolt and draws the chain across the door. then she starts to go upstairs.
jill reaches the front door. carefully, quietly, she turns the bolt. then o.s. she hears a creak. she turns and looks up the staircase. at the top, a door is opening. someone is coming out! a mumbling sound is heard on the sound track.
tracy goes up to the closet with her coat. the door is closed. she opens it. she hangs up her coat and closes the door again. then she turns and starts walking out of the hallway to the living room.
as jill comes down the stairs. carol, the sitter, is at the foot of the stairs with john. carol has an armful of schoolbooks.
they look into the living room. carol isn't there.