Benedict Cumberbatch has insisted there are not many similarities between Alan Turing and Sherlock Holmes.
The actor said that apart from both being geniuses, he found playing master codebreaker Turing in The Imitation Game very different to the role of the maverick detective.
Benedict said: "Alan's not strutting around trying to prove everyone wrong and himself right [like Sherlock].
"He's quietly working at changing things from a unique perspective of lateral thinking, but not then broadcasting it to the world in a swishy long coat to make policemen feel stupid.
"Alan's much more into tweed. Sherlock has a bit of tweed going on, I suppose, with the deerstalker, but yeah, they're different..."
A pioneering mathematician and computer scientist, Turing's part in cracking the German Enigma code at Bletchley Park went unrecognised in his own lifetime. In fact, his reputation and career were destroyed in 1952 by a conviction for homosexuality - or an act of "gross indecency" - which led to him accepting chemical castration as an alternative to imprisonment. Two years later, aged 41, this tragic, unsung hero committed suicide.
Benedict said: "He was someone who was caring and loving, as well as someone who was very determined and often in isolation.
"If any young person's ever felt like they aren't quite sure of who they are, or aren't allowed to express themselves the way they'd like to express themselves, if they've ever felt bullied by what they feel is the normal majority, or anything that makes them feel like an outsider, then this is definitely a film for them. It's about a hero for them."
:: The Imitation Game is in cinemas now.