8x1 - The Ruth Rendell Mysteries

Andrew Fielding, a good-looking young teacher, marries Alice Whittaker, a rich woman in her late thirties, more than ten years older than he is. All seems well until Alice introduces Andrew to Nesta Drage, her best friend, who quickly vanishes without trace. Meanwhile, Alice more and more doubts whether Andrew loves her - and if he is just a gold-digger, might he have something to do with Nesta's disappearance? Alice begins a search for Nesta - but Andrew does his best to tie his wife to the house.