Damian Lewis found therapy to be ''unhelpful''.

The 'Homeland' star entered therapy following the sudden death of his mother in a car crash in India in 2001, but says it did little to ease his sense of pain.

The 43-year-old actor explained: ''I had about three sessions, after my mother died. He was extremely good, but it was unhelpful. It didn't add anything. I didn't leave therapy from fear, I left from ... Being an actor is a constant exploration and examination of others. Of self. Of things that motivate people.

''So you do sort of have that training [in psychology] anyway. You're an observer. And if you're good, you're a sympathetic and understanding observer.''

Damian added that actors have a broader responsibility than a mere entertainer.

He told The Times newspaper: ''I think actors are a force for good. I think actors can be a glue. A societal glue. Their empathy, their sympathy, their ... understanding of other people, their generosity of spirit, their willingness to engage, to commit, sometimes just socially ... Actors can open up social occasions with their warmth, with their wit. Social measures.''