SAIRA Khan has launched legal action against Celebrity SAS: Who Dares Wins after suffering life-changing injuries.
The former Loose Women star bears physical scars after taking on "one of the toughest selection courses yet".
Saira, 51, fell into "shock" when she was badly hurt by the undisclosed incident, which has been kept under wraps by show bosses.
Ahead of the series launch tonight, Saira revealed: "Unfortunately legally I can't go into much detail about it because it's still ongoing.
"I was left with life-long scars, physical ones. That's very hard to cope with.
"I am a very fit individual and to go onto a show and then have experienced what I did, I was in real shock.
"The show was great in supporting, but it's gone beyond that. It's gone onto something a bit bigger than that."
Saira joined stars including Kerry Katona, Ulrika Johnson and Wes Nelson being put through their paces by chief instructor Ant Middleton.
The group left behind their glamorous lifestyles to head into the wilds of the Inner Hebrides in Scotland to the remote island of Raasay.
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Saira's experience didn't just spark a change in her personality, but catapulted a huge change in Saira's life too.
After returning from base camp, Saira quit Loose Women after five years.
"I did take big drastic steps, she says.
"I left Loose Women and, interestingly, Andrea McLean left Loose Women after doing SAS.
"It changes your life. You realise you've got to cut through the s**t and start living.
"When you're stripped of everything as a naked woman all you have to depend upon is yourself.
"That's very telling, very strong and most people will never experience that.
"I didn't want to go back to the same s**t, getting the same results, so I changed my life.
"I'm actually very happy about it."
It's for that reason that Saira doesn't regret signing up for the intense experience - despite her life-long injuries.
"I kind of look back on that experience partly kicking myself", she admits.
"Thinking why did I have to do to prove myself because I've now caused myself something for life.
"At the same time I wouldn't have not done it because it's the person I am. I needed to go and prove something to myself.
"I've never felt successful in my life, ever," she added.
"Doing SAS, I knew I was strong but I felt strong. I proved to myself that I don't need to prove myself.
"Up until the point of doing SAS I had never appreciated what I'd got.
"Going to that level of extremity really made me realise I've got to stop. I don't need to keep proving myself, but just enjoy what I've got and celebrate what I've achieved.
"For me this show will always be really special because it was deeply personal.
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"I think for the first time ever in my life I was really proud of myself. That's quite a hard thing to say for me, but I really was."
- Celebrity SAS: Who Dares Wins airs on Channel 4, Sunday at 9pm.