Christopher Dean shares the heartbreaking story of watching his mum leave home when he was just six years old in tonight's DNA Journey.
The celebrity family history show tracks the ancestors of pairs of famous friends, and tonight (Tuesday) it's the turn of Olympic skating legends Torvill and Dean.
As they take a drive around their home city of Nottingham, the car stops outside of a flat that Dean, 63, lived in as a child and he tells Jayne Torvill about a traumatic memory from his time there.
In the ITV show, Dean says: "I actually do remember I was in my bedroom, I just remember seeing my mum leaving with a suitcase and getting into a car, I saw her from the window. I hadn't been told that she was going, but I just remember her going.
"And then an hour or so later another car pulled up and then stepmum arrived, Betty."
Read more: All the Dancing On Ice winners so far
Torvill looks shocked as she asks: "Wow. And your dad didn't say anything?"
Dean replies: "No. I think I was six. I think that was one of the days when I became my own little island, just being self sufficient.
"My mum I think regretted every day of her life that she left me."
The skater got back in contact with his mother eventually and he and Torvill talk about her many visits to watch them in their roles on Dancing On Ice.
Dean says: "I noticed whenever I caught her eye, whatever was happening on the ice, she only looked at me. I think there was a lot of sorrow that she missed out on so much."
There is a happy discovery for Dean, who finds he has a huge family on his mother's side in Utah where coincidentally, his son goes to university.
He is clearly moved during a video call with his long-lost relatives who welcome him in to their family.
Dean says: "They're such a tight, close-knit family. I've never had that."
He adds to Torvill: "You've always just been my family."
DNA Journey airs tonight at 9pm on ITV.
Watch: Ant and Dec's DNA Journey