When Linda Rix tries to escape from her bedroom and gets stuck on the window-ledge, Carter shins up a drainpipe to rescue her: we see them from the outside and then from inside through her bedroom window. But after a 5-second cutaway shot, we see Linda on her own clutching the drainpipe - there is no sign of Carter.
The characters played by Bernard Stone and Rosemary Martin are credited as Mr and Mrs Lipman but they are referred to numerous times in dialogue as Mr and Mrs Riller.