Firth: Eric Lomax's experience 'beyond comprehension'
2 December 2013 Last updated at 10:25 GMT
Colin Firth has described the experience of British Army officer Eric Lomax in World War II as "beyond comprehension".
The actor plays the role of Lieutenant Lomax - who died in 2012 at the age of 93 - in his new film The Railway Man.
Lt Lomax's arms were broken, his ribs were cracked and he was waterboarded - years before the term was coined - by his Japanese captors, and suffered from post traumatic stress for decades afterwards.
Speaking to the Today programme's Sarah Montague, Colin Firth said: "As a personal story, I don't know how to estimate the kind of courage that (Eric Lomax) displayed."
"I had a very strong feeling that perhaps it was time this story was told," he added.
First broadcast on the Today programme on Monday 2 December.