Mention AI and the formula is already there. Naturally the 'robot' has to look weird and unsettling. As a morality tale you don't give the equivalent of Alexa the digital keys to the coffers and don't programme them to watch tv and learn. When it then comes to driverless cars forget it. Sadly we don't seem to ever get a normal household aide that doesn't become psychotic. For those trying to encourage more AI in our lives this certainly doesn't help the cause. The storyline certainly kept us gripped to the end but with an open ended finale as TIM predicts the scenario the homeowner would have to explain. At least this was 'enjoyable' enough that we didn't regret the time watching which can be rare now.
