I can't remember what the very first programme was but the earliest memory I have of something on TV that gripped my attention is the extended news coverage of the Aberfan disaster.
I was the same age as many of the children who died (8 years old) and I recall watching the poor parents frantically digging in the dark with their bare hands, desperately trying to reach their children who were buried beneath.
It's an image that has never left me in all these years and I have often thought about those children, who would now be in their 60s, and all that they lost - their childhood, their youth, their first kiss, love, relationships, children, careers, adventures, hobbies, happy times, sad times, grandchildren and all the other myriad experiences of life.
TV is a powerful medium: it brings the world into our sitting-rooms.