When Joe Scully follows Ellen into her office building (starts at 19:34), Ellen is wearing brown, wide-legged trousers. When she enters her conference room a few seconds later, she is wearing a gray skirt. When she walks out on the roof a few seconds after that, she is again wearing the trousers. A day or two later (at around 58 mins), Ellen is wearing the exact same outfit she wore in the conference room - gray skirt, brown blouse, dark jacket.