The episode is filmed at the first home he bought with his late wife, Linda, in 1966 following his first wave of success.
Manygate Lane, in Shepperton, Surrey, is 150 miles from Pontypridd, and, at the time, was an estate home to a number of celebrities, but Jones remained grounded in his Welsh roots.
“I had a new Jaguar, I had a new house, and I went back to Wales, because I would go back whenever I could,” he recalled.
“One Sunday night, I’d been out with my father and when we got home, my mother was cutting sandwiches for him. I said, ‘where are you going?’ He said, ‘I’m going to work, I’m on the night shift.’ I said, ‘You can’t go to work.’ And he said, ‘I’m a coal miner, that’s what I do’.
“I said, ‘but I’m making a lot of money now’. He said, ‘yeah, but how long is it going to last?’
“That was a big deal for me, to get him out of the coal mine – it was a dangerous job.”
Jones eventually gave the Manygate Lane house to his parents but the move did not suit his father, who would sometimes become depressed and be unable to get out of bed.
“Everything they knew was in Pontypridd.”