A former Royal Marine Commando and Special Forces Sergeant - now turned television star - is telling the story of war through emotion in his new book.
Ahead of the release of 'Battle Scars', Jason Fox told Forces News he hopes it will get people talking more openly about mental health, after struggling with post-traumatic stress disorder (PTSD):
"The main reason for me talking about it and then writing the book is basically to hopefully get people to open up a little bit and try and remove the stigma of mental health."
Mr Fox, better known for his starring role in 'SAS: Who Dares Wins', was medically discharged from the Special Boat Services (SBS) with PTSD in 2012.
He says he first noticed that something wasn't quite right when he started to feel "detached" from the Special Forces, which felt "alien" to him as he always loved his job.
Mr Fox had been on a tour and after coming home he started to prepare for a four-month operation but says he wasn't looking forward to it:
"I wasn't looking forward to it as it was like a dark cloud looming in the distance.
"That felt alien because I'd always looked forward to doing my job and I wanted to try and address that."
It was around that time he realised something was wrong.
But he says he felt he couldn't talk openly about it.
"I found it very difficult to talk about it while I was serving.
"Mainly because I was worried about the perception of me. I was worried about it affecting my career.
"It was something I never believed in before and then obviously I had to believe in it - so it was difficult for me to admit that to myself."
Mr Fox joined the Royal Marines at the age of 16, following in his father footsteps.
In 2001 he joined the SBS but says when he signed up, he joined a world that had changed after the tragedy of 911.
"I joined the Special Forces just post 911 and the world changed - it did for me and many millions of other people."
For current service personnel, Mr Fox says the stigma on mental health is still there but it has improved:
"For people serving now it is different - however, there is still a stigma there because people are still not talking about it."
He added: "I think there's still a long way to go but it is a lot better than it was - especially when I was going through it."