Mark Gatiss on The Private Life of Sherlock Holmes. Subscribe: http://bit.ly/subscribetotheBFI.

Writer-producer Mark Gatiss talks to Ian Haydn Smith about his admiration for Billy Wilder's The Private Life of Sherlock Holmes (1970), a film that had a great influence on his TV series, Sherlock. This BFI members' event series is presented in partnership with American Express.

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