Matthew Parris presents the biographical series in which his guests choose someone who has inspired their lives. Here, Sir Clive Sinclair nominates fellow inventor Thomas Edison. Edison invented sound recording, the electric light bulb and moving pictures, but also had his fair share of duds along the way. Sir Clive invented the first electronic calculator but also the ill-fated C5 electric car. Separated by a century, do the two men have anything in common? Joining the discussion is Edison's biographer Neil Baldwin.

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