A birthday dinner. A trivial row over bubble and squeak. A husband dead in the kitchen.

But the case of Penelope Jackson was never as simple as the headlines made it seem. Behind the sensational 999 call lay allegations of coercive control, long-buried violence, lockdown pressure, and a marriage built on fear, silence, and image.

In this episode of Peculiar Britain, we explore one of Britain’s most controversial domestic homicide cases and ask: where is the line between murder and psychological breaking point?