I cannot remember much about my school days, I was sixteen at the time, but this sticks very firmly in the memory from those days. The beginning was innocent enough but earlier episodes gave this an added frisson of anticipation. We did not have TV so I watched this series at a friends home on the outskirts of Sheffield. The last bus had gone by the end of the programme and a five mile walk at night, past a railway tunnel entrance, Sheffield Corporation's nuclear bunker, and a cemetery had me walking along the white line down the centre of the road, ready to jump either way. I've often thought of this programme and would love to see it again, along with all the other 1960's episodes. Terrifying, Riveting, but Forever unforgettably Fascinating