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Stephen Mangan on playing Douglas Adams' Dirk Gently

15 December 2010 Last updated at 12:16 GMT

The actor, Stephen Mangan talks to BBC Breakfast about playing the lead role in Dirk Gently's Holistic Detective Agency, adapted from the novel for BBC Four.

Its writer, the late Douglas Adams, always thought that his stories about Dirk Gently, the hapless detective, would make a better film than The Hitchhiker's Guide to the Galaxy, but found it difficult to get his books adapted at the time.